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Journal articles on the topic 'Microstrip-to-slotline transitions'

Author: Grafiati

Published: 9 September 2022

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1

U-yen, Kongpop, Edward J. Wollack, Stephen Horst, Terence Doiron, John Papapolymerou, and Joy Laskar. "Slotline Stepped Circular Rings for Low-Loss Microstrip-to-Slotline Transitions." IEEE Microwave and Wireless Components Letters 17, no. 2 (February 2007): 100–102. http://dx.doi.org/10.1109/lmwc.2006.890328.

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2

Wen-Hua Tu and Kai Chang. "Wide-band microstrip-to-coplanar stripline/slotline transitions." IEEE Transactions on Microwave Theory and Techniques 54, no. 3 (March 2006): 1084–89. http://dx.doi.org/10.1109/tmtt.2005.864127.

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3

Soltysiak, P., and J. Chramiec. "Design of broadband transitions from microstrip to slotline." Electronics Letters 30, no. 4 (February 17, 1994): 328–29. http://dx.doi.org/10.1049/el:19940200.

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4

Mohyuddin, Wahab, Gwan Hui Lee, Dong Sik Woo, Hyun Chul Choi, and Kang Wook Kim. "Compact Ultra-Wideband Phase Inverter Using Microstrip-CPW-Slotline Transitions." Electronics 10, no. 3 (January 22, 2021): 252. http://dx.doi.org/10.3390/electronics10030252.

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A planar ultra-wideband phase inverter, which consists of a series of transitions between microstrip, coplanar waveguide, and slotline, is designed and implemented. This compact-sized phase inverter can be used to generate wideband 180° phase differential signals, especially at high microwave frequencies up to millimeter-waves. The design is based on the impedance matching and smooth field transformation between the transitional stages. The fabricated transition has dimensions of 7.36 mm × 5.08 mm, and provides ultra-wide frequency bandwidth from 13 GHz to 38 GHz with low insertion loss of better than 2 dB within ±5° phase deviation and with return loss of greater than 10 dB.

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5

Guo, Xin, Lei Zhu, Jianpeng Wang, and Wen Wu. "Wideband Microstrip-to-Microstrip Vertical Transitions Via Multiresonant Modes in a Slotline Resonator." IEEE Transactions on Microwave Theory and Techniques 63, no. 6 (June 2015): 1902–9. http://dx.doi.org/10.1109/tmtt.2015.2422695.

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6

Abbosh, A. M. "Wideband Planar Crossover Using Two-Port and Four-Port Microstrip to Slotline Transitions." IEEE Microwave and Wireless Components Letters 22, no. 9 (September 2012): 465–67. http://dx.doi.org/10.1109/lmwc.2012.2209632.

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7

Xu, Sha, Haoshen Zhu, and Wenjie Feng. "A wide‐band balanced‐to‐unbalanced power divider using microstrip‐slotline‐SIW transitions." Microwave and Optical Technology Letters 64, no. 1 (November 19, 2021): 110–16. http://dx.doi.org/10.1002/mop.33099.

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8

Zhu, He, Zhiqun Cheng, and Y. Jay Guo. "Design of Wideband In-Phase and Out-of-Phase Power Dividers Using Microstrip-to-Slotline Transitions and Slotline Resonators." IEEE Transactions on Microwave Theory and Techniques 67, no. 4 (April 2019): 1412–24. http://dx.doi.org/10.1109/tmtt.2019.2897928.

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9

Yang, Liang, Cheng Lu, Jialin Wang, Shunli Li, Hongxin Zhao, and Xiaoxing Yin. "Postwall-Slotline Stepped Impedance Resonator and Its Application to Bandpass Filter with Improved Upper Stopband." Electronics 11, no. 6 (March 9, 2022): 851. http://dx.doi.org/10.3390/electronics11060851.

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In this letter, a postwall-slotline stepped impedance resonator (PWS-SIR) is proposed and applied to a bandpass filter (BPF) with a wide stopband. The proposed PWS-SIR-BPF comprises three U-shaped PWS-SIRs and two microstrip-slot feeding transitions. A PWS has a much lower impendence which a conventional slotline (CSL) cannot reach, so a much smaller impendence ratio of the PWS-SIR can be achieved. Consequently, a wider stopband simultaneously can be realized for the proposed filter. The designed PWS-SIR-BPF, as well as a CSL-BPF, have been fabricated, measured, and compared to verify the features of the PWS-SIR. The measured results are consistent with the simulation ones. The PWS-SIR is 7.3 mm (0.22λ0) long, 67% of 11.1 mm (0.34λ0) of the CSL resonator. The first spurious resonance frequency of the PWS-SIR-BPF is extended from 9.8 GHz (2f0) to 23 GHz (4.7f0).

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10

Ahmed, U. T., and A. M. Abbosh. "Three‐octave band in‐phase power divider using loosely coupled microstrip lines and microstrip to slotline transitions." Electronics Letters 51, no. 24 (November 2015): 2019–21. http://dx.doi.org/10.1049/el.2015.3119.

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11

Nguyen, P. T., A. Abbosh, and S. Crozier. "Wideband and compact quasi‐Yagi antenna integrated with balun of microstrip to slotline transitions." Electronics Letters 49, no. 2 (January 2013): 88–89. http://dx.doi.org/10.1049/el.2012.3192.

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12

Ahmed, U. T., and A. M. Abbosh. "Wideband out‐of‐phase power divider using tightly coupled lines and microstrip to slotline transitions." Electronics Letters 52, no. 2 (January 2016): 126–28. http://dx.doi.org/10.1049/el.2015.3255.

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13

Guo, L., A. Abbosh, and H. Zhu. "Ultra‐wideband in‐phase power divider using stepped‐impedance three‐line coupled structure and microstrip‐to‐slotline transitions." Electronics Letters 50, no. 5 (February 2014): 383–84. http://dx.doi.org/10.1049/el.2013.4160.

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14

Ahmed, Ummee T., and Amin M. Abbosh. "Wideband out-of-phase power divider using microstrip to slotline transitions, coupled lines, and shunt open-ended stubs." Microwave and Optical Technology Letters 57, no. 9 (June 26, 2015): 2216–18. http://dx.doi.org/10.1002/mop.29296.

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15

Lee, Jung Seok, Gwan Hui Lee, Wahab Mohyuddin, Hyun Chul Choi, and Kang Wook Kim. "Design of an Ultra-Wideband Microstrip-to-Slotline Transition on Low-Permittivity Substrate." Electronics 9, no. 8 (August 17, 2020): 1329. http://dx.doi.org/10.3390/electronics9081329.

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Analysis and design of an ultra-wideband microstrip-to-slotline transition on a low permittivity substrate is presented. Cross-sectional structures along the proposed transition are analyzed using conformal mapping assuming quasi-TEM modes, attaining one analytical line impedance formula with varying design parameters. Although the slotline is a non-TEM transmission line, the transitional structures are configured to have quasi-TEM modes before forming into the slotline. The line impedance is optimally tapered using the Klopfenstein taper, and the electric field shapes are smoothly transformed from microstrip line to slotline. The analytical formula is accurate within 5% difference, and the final transition configuration can be designed without parameter tuning. The implemented microstrip-to-slotline transition possesses insertion loss of less than 1.5 dB per transition and return loss of more than 10 dB from 4.4 to over 40 GHz.

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16

Zhao, Yuan, Bing Liang Hu, Chao Deng, Hong Wei Wang, Lei Li, and Ying Wang. "Improved Design of Microstrip-to-Slotline Transition." Applied Mechanics and Materials 668-669 (October 2014): 844–47. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.844.

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A novel compact Ultra-Wide Band (UWB) microstrip-slotline transition utilizing high impedance chip resistor is proposed and analyzed. The reactance introduced by the microstrip open end and slotline short end, which is the main limitation to the bandwidth in the traditional structures, is minimized in the design. The model is analyzed with the method of equivalent circuits and simulated by the commercial software HFSS. To test the performance of this transition a back-to-back structure is fabricated. The measurement results show that the bandwidth of 45 octaves can be obtained while the insert loss is better than 0.7dB within the band.

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17

Zhang, Y., B. Z. Wang, and J. Hong. "Lumped-element microstrip-to-slotline transition." Electronics Letters 40, no. 22 (2004): 1419. http://dx.doi.org/10.1049/el:20046553.

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18

Li, J. L., W. Shao, and X. S. Yang. "An ultra-wideband microstrip-to-slotline transition." Journal of Electromagnetic Waves and Applications 26, no. 14-15 (August 24, 2012): 1889–96. http://dx.doi.org/10.1080/09205071.2012.719602.

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19

Wei, Feng, Hao-Jie Yue, and Xiao-Wei Shi. "A Balanced Dual-Band BPF with High CM Suppression and Improved Selectivity." Frequenz 73, no. 7-8 (July 26, 2019): 261–65. http://dx.doi.org/10.1515/freq-2018-0243.

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Abstract In this paper, a balanced dual-band bandpass filter (BPF) is designed based on microstrip folded stepped impedance split ring resonators (SISRRs) and balanced microstrip/slotline transition structures. The center frequencies and the fractional bandwidths (FBWs) of the two differential-mode (DM) passbands can be tuned by changing the physical lengths of two SISRRs and the gaps between the two resonators, respectively. The balanced microstrip/slotline transition structures can achieve a wideband common-mode (CM) suppression. Moreover, the DM passbands are independent from the CM responses, which significantly simplifies the design procedure. In addition, due to 0-degree feed structure and cross coupling structure, more transmission zeros can be realized, which can improve the passbands selectivity greatly. In order to validate the design strategies, a balanced dual-band BPF centered at 2.47 GHz and 5.21 GHz was fabricated and a good agreement between the simulated and measured results is observed.

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20

Wei, Feng, Xin Tong Zou, Xin Yi Wang, Bin Li, and Xi Bei Zhao. "A Differential UWB Quasi-Yagi Antenna with A Reconfigurable Notched Band." Frequenz 72, no. 9-10 (August 28, 2018): 401–6. http://dx.doi.org/10.1515/freq-2018-0018.

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Abstract A compact differential ultra-wide band (UWB) planar quasi-Yagi antenna is presented in this paper. The proposed antenna consists of a balanced stepped-impedance microstrip-slotline transition structure, a driver dipole and one parasitic strip. A wide differential-mode (DM) impedance bandwidth covering from 3.8 to 9.5 GHz is realized. Meanwhile, a high and wideband common-mode (CM) suppression can be achieved by employing the balanced stepped-impedance microstrip-slotline transition structure. It is noted that the DM passband is independent from the CM response, which can significantly simplify the design procedure. In addition, a reconfigurable sharp DM notched band from 5.6 to 6.7 GHz is generated by adding one pair of quarter-wavelength varactor-loaded short-circuited stubs adjacent to the microstrip line symmetrically. In order to illustrate the effectiveness of the design, two prototypes of the antennas are designed, fabricated, and measured. A good agreement between the simulated and measured results is observed.

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21

Fei, P., W. Hu, Y. C. Jiao, F. S. Zhang, and Z. Zhang. "Compact coupled line broadband microstrip to slotline transition." Electronics Letters 47, no. 13 (June 23, 2011): 751–52. http://dx.doi.org/10.1049/el.2011.1078.

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22

Liu, Yaxin, Feng Wei, Xiaowei Shi, and Cao Zeng. "A balanced-to-balanced directional coupler based on branch-slotline coupled structure." Frequenz 74, no. 11-12 (November 26, 2020): 427–33. http://dx.doi.org/10.1515/freq-2019-0199.

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AbstractIn this paper, a balanced-to-balanced (BTB) branch-slotline directional coupler (DC) is firstly presented, which can realize an arbitrary power division ratios (PDRs). The coupler is composed by microstrip-to-slotline (MS) transition structures and branch-slotline coupled structures. The single-ended to balanced-ended conversion is simplified and easy to implemented by the MS transition structures, which intrinsically leads to the differential-mode (DM) transmission and common-mode (CM) suppression. Moreover, the different PDRs which are controlled by the widths of branch-slotlines can be achieved. In order to verify the feasibility of the proposed design method, two prototype circuits of the proposed coupler with different PDRs are fabricated and measured. The return loss and the isolation of two designs are all better than 10 dB. Moreover, the CM suppressions are greater than 35 dB. A good agreement between the simulation and measurement results is observed.

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23

Fei, P., Y. C. Jiao, W. Hu, and F. S. Zhang. "Microstrip to slotline transition with a 22:1 bandwidth." Journal of Electromagnetic Waves and Applications 26, no. 11-12 (July 10, 2012): 1500–1506. http://dx.doi.org/10.1080/09205071.2012.703516.

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24

Cheng, Wei, Lin Li, Jingjing Du, Junxiu Yang, and Xiaowei Gu. "A Compact and Vialess Vertical Microstrip-to-Microstrip Differential Transition." Frequenz 73, no. 1-2 (January 28, 2019): 19–24. http://dx.doi.org/10.1515/freq-2018-0074.

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Abstract In this paper, a new compact, vialess and vertical microstrip-to-microstrip differential transition is presented based on half-wavelength slotline structure. The equivalent-circuit model is constructed, and theoretical analyses based on equivalent circuit model reveal that good differential mode (DM) signal transmission between the top- and bottom-layer differential microstrip lines can be achieved over a wide frequency range determined while the common mode (CM) signal is rejected. Moreover, the systematic design method is presented to extract the values of electrical parameters from prescribed performance in terms of its operating bandwidth and ripple levels. In addition, owing to the employment of half-wavelength slot, the proposed differential transition has a compact size. Finally, the proposed differential transition and design theories are well vindicated by an exemplary circuit centered at 2.45 GHz with the measured relative frequency bandwidth (FBW) of 114 %.

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25

Zou, Xin Tong, Zhi Jie Yang, Feng Wei, Bin Li, and Xiao Wei Shi. "Compact Balanced Single-Band and Dual-Band BPFs with Controllable Bandwidth Using FoldedS-Shaped Slotline Resonators (FSSRs)." Frequenz 73, no. 1-2 (January 28, 2019): 13–18. http://dx.doi.org/10.1515/freq-2018-0086.

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Abstract In this paper, two compact balanced bandpass filters (BPFs) using half-wavelength folded S-shaped slotline resonators (FSSRs) are designed. The proposed FSSR is realized by extending and folding a traditional S-shaped slotline resonator, which can affect the internal coupling of resonator and reduce the size of the resonator. The balanced stepped-impedance microstrip-slotline transition structures are employed to generate a wideband common-mode (CM) suppression. The proposed filters can realize a single-band differential-mode (DM) bandpass response or a dual-band one by employing one or three FSSRs, respectively. Moreover, the center frequencies of the DM passbands are independent from the CM responses, which can simplify the designs procedure significantly. In order to validate their practicability, a compact balanced dual-band BPF with controllable center frequencies and bandwidths is fabricated and good agreement between the simulated and measured results is observed.

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26

Ta, Son Xuat, Byoungchul Kim, Hosung Choo, and Ikmo Park. "Wideband quasi-yagi antenna fed by microstrip-to-slotline transition." Microwave and Optical Technology Letters 54, no. 1 (November 22, 2011): 150–53. http://dx.doi.org/10.1002/mop.26504.

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27

El Haj Sleimen, M., and M. Himdi. "A microstrip-to-slotline transition used to feed a V-shape dipole." Microwave and Optical Technology Letters 43, no. 5 (2004): 428–30. http://dx.doi.org/10.1002/mop.20491.

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28

Qiao, Luyan, Rui Li, Ying Han, Feng Wei, Yong Yang, Xiaoning Yang, and Nankai Wu. "A Balanced Filtering Directional Coupler with Wide Common-Mode Suppression Based on Slotline Structure." Electronics 10, no. 18 (September 14, 2021): 2254. http://dx.doi.org/10.3390/electronics10182254.

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In this paper, a balanced-to-balanced filtering directional coupler (FDC) that can realize a 3 dB coupling degree directional coupler with high isolation and directivity is proposed. The design of the proposed FDC is primarily based on microstrip/slotline transition structures, resonance structures, and odd–even mode phase velocity compensation structures. A U-type microstrip feed line integrated with a stepped-impedance slotline resonator is adopted at the input and output ports, which makes the differential-mode (DM) responses independent of the common-mode (CM) ones, and brings superior DM transmission and CM suppression. In addition, by loading the microstrip stub-loaded resonators (SLRs), a DM passband with sharp filtering performance is realized, and transmission zeros (TZs) can be added into the design, which makes it more selective. Moreover, phase compensating slotlines are added into the coupling structure to enhance the isolation. In order to verify the feasibility of the proposed design method, an FDC prototype circuit was made and tested. The simulation results are in good agreement with the measured results. The designed coupler’s DM operating band covers 2.65 GHz to 3 GHz (FBW = 12.4%), and the insertion and return losses are 4.6 dB and 20 dB, respectively. The isolation degree is better than 15 dB, and the CM suppression is more than 55 dB. The total coupler size is about 67.7 mm × 63.8 mm. The designed balanced-to-balanced FDC can be widely used in S-band wireless communication systems.

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29

Yang, Li, Lei Zhu, Wai-Wa Choi, Kam-Weng Tam, Runqi Zhang, and Jianpeng Wang. "Wideband Microstrip-to-Microstrip Vertical Transition With High Filtering Selectivity Using Open-Circuited Slotline SIR." IEEE Microwave and Wireless Components Letters 27, no. 4 (April 2017): 329–31. http://dx.doi.org/10.1109/lmwc.2017.2678423.

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30

Lin, Fenghan, Yong-Chang Jiao, and Yihong Qi. "A Wideband Microstrip to Bilateral Slotline Transition Using Constant Impedance Bilateral Slotline and Heart-Shaped Irregular Cavity." IEEE Microwave and Wireless Components Letters 23, no. 5 (May 2013): 255–57. http://dx.doi.org/10.1109/lmwc.2013.2255123.

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31

Xu, Haiyan, Jianpeng Wang, Zhiping Chen, Na Zhang, and Yaping Zheng. "Design of a filtering power divider with microstrip‐to‐slotline transition structures." Electronics Letters 53, no. 19 (September 2017): 1314–16. http://dx.doi.org/10.1049/el.2017.2166.

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32

Wang, Nai-Biao, Yong-Chang Jiao, Li Zhang, Yue Song, and Fu-Shun Zhang. "A simple low-loss broadband 1-14 GHz microstrip-to-slotline transition." Microwave and Optical Technology Letters 51, no. 9 (June 19, 2009): 2236–39. http://dx.doi.org/10.1002/mop.24518.

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33

Ta, Son Xuat, and Ikmo Park. "Wideband Double Dipole Quasi-Yagi Antenna Using a Microstrip-to-Slotline Transition Feed." Journal of electromagnetic engineering and science 13, no. 1 (March 31, 2013): 22–27. http://dx.doi.org/10.5515/jkiees.2013.13.1.22.

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34

Kim, Young, Seok-Hyun Sim, and Young-Chul Yoon. "Transmission Line using Microstrip-Slotline Transition Technology and Its Application to Power Divider." Journal of Korea Navigation Institute 17, no. 6 (December 30, 2013): 687–92. http://dx.doi.org/10.12673/jkoni.2013.17.6.687.

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35

NaghshvarianJahromi, M. "Novel Compact Meta-Material Tunable Quasi Elliptic Band-Pass Filter Using Microstrip to Slotline Transition." Journal of Electromagnetic Waves and Applications 24, no. 17-18 (January 1, 2010): 2371–82. http://dx.doi.org/10.1163/156939310793675808.

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36

Ma, Liang, Rui Xu, Hongchen Wen, Zhenbing Li, Jian Li, and Yongjun Huang. "Low-Profile Ultra-Broadband Log-Period Monopole End-Fire Antenna." International Journal of Antennas and Propagation 2018 (December 23, 2018): 1–8. http://dx.doi.org/10.1155/2018/7483719.

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This paper proposes an ultra-broadband (2–13 GHz) and low-profile log-period monopole end-fire antenna for the flush-mounted applications. 24 monopoles with a log-period rule are used to cover the whole operating frequency band, and those monopoles are printed on both sides of a low-loss dielectric layer vertically placed over a slot feeding line with wideband microstrip-to-slotline transition. The low profile is realized by bending the parts of the long monopoles so that the overall antenna size is obtained as 40 mm × 100 mm × 13.6 mm. The proposed antenna is fabricated, and the measured results agree with the simulated results very well. The measured results indicate that the proposed antenna can work at the whole 2–13 GHz band with very good end-fire radiation patterns and stable gain performances.

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37

Zhang, Xue-Wei, Shao-Bin Liu, Qi-Ming Yu, Ling-Ling Wang, Kun-Liao, and Jian Lou. "Ultra-wideband surface plasmonic bandpass filter with extremely wide upper-band rejection." Chinese Physics B, March 23, 2022. http://dx.doi.org/10.1088/1674-1056/ac6015.

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Abstract An ultra-wideband bandpass filter (BPF) with a wide out-of-band rejection based on surface plasmonic waveguide (SPW) slotline with ring grooves is designed and analyzed. A pair microstrip to slotline transition is designed for quasi-TEM to TM mode conversion by using a microstrip line with the circular pad and the slotline with the same circular slot. The mode conversion between the TM and the surface plasmon polaritons (SPP) mode is realized by using gradient slotline with ring grooves and impedance matching technique. The upper cut-off frequencies of the passband can be adjusted by using these proposed SPP units, while the lower frequencies of the passband are created by using the microstrip to slotline transitions, an ultra-wideband BPF is realized. The dispersion curves of SPP units, electric field distribution, and the transmission spectra of the proposed ultra-wideband bandpass filter are all calculated and analyzed by the finite difference time domain (FDTD) method. The simulated results show that the presented filter has good performance including a wide 3-dB bandwidth of 149% from 0.57 GHz to 3.93 GHz, an extremely wide 40-dB upper-band rejection from 4.2 to 18.5 GHz, and low loss and high selectivity in the passband. To prove the design validity, a prototype of the BPF has been manufactured and measured, showing a reasonable agreement with simulation results. The unique feature of the proposed BPF may be applicable for integrated circuit and plasmonic devices in microwave or THz frequency.

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Dai, Chunliang, Ying Han, Lu Yan Qiao, and Feng Wei. "A balanced dual-band BPF with quasi-independently tunable center frequency and bandwidth." Frequenz, March 17, 2022. http://dx.doi.org/10.1515/freq-2021-0238.

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Abstract By introducing an open stub loaded resonator (OSLR) and a uniform impedance resonator (UIR) into balanced stepped-impedance microstrip-slotline transition structures, a balanced dual-band bandpass filter (BPF) with high selectivity and low insertion loss performance is presented in this paper. The balanced microstrip-slotline transition structures can achieve a wideband common-mode (CM) suppression. Meanwhile, the differential-mode (DM) passbands are independent from the CM responses, which greatly simplifies the design procedure. In addition, four varactors are loaded into OSLR and UIR to achieve the electrical reconfiguration. The proposed balanced dual-band BPF can realize quasi-independently tunable center frequencies and bandwidths. In order to verify the feasibility of the proposed design method, a prototype circuit of the proposed reconfigurable balanced dual-band BPF is simulated, fabricated and measured. A good agreement between the simulation and measurement results is observed.

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39

Wei, Feng, Xin Yi Wang, Dun Wei Liao, and Xiao Wei Shi. "Tunable Balanced Bandpass Filter with High Common-mode Suppression Based on SLSRs." Frequenz 71, no. 11-12 (January 26, 2017). http://dx.doi.org/10.1515/freq-2016-0357.

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AbstractA tunable balanced bandpass filter (BPF) with a good common-mode (CM) suppression based on slotline resonators is proposed in this letter. Two novel stub-loaded slotline resonators (SLSRs) terminated with varactors are designed to obtain tunable differential-mode (DM) responses. It is found that a high and wideband CM suppression can be achieved by employing balanced stepped-impedance microstrip-slotline transition structures. Moreover, the DM passbands are independent from the CM ones, which can significantly simplify the design procedure. To validate the design theory, a compact tunable balanced BPF with an operating frequency band ranging from 3.09 GHz to 3.6 GHz is designed and fabricated. The measured results are found to agree well with the simulated ones.

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40

Zhu, Yu, Kaijun Song, and Yong Fan. "High selectivity wideband 180° phase shifters with the functionality of vertical transition." International Journal of Microwave and Wireless Technologies, August 19, 2020, 1–7. http://dx.doi.org/10.1017/s1759078720001105.

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Abstract In this paper, a high selectivity wideband 180° phase shifter (PS) with the functionality of vertical transition is presented. The whole circuit is realized based on the hybrid microstrip/slotline (SL) structure. By introducing the short-circuited microstrip stepped-impedance resonators, two transmission zeros are created to improve the selectivity of the PS. With the SL in the center ground layer, a frequency independent 180° PS can be obtained. The even/odd-mode equivalent circuits of the proposed PS are analyzed to guide the design. Finally, a practical wideband 180° PS with high filtering selectivity is designed and fabricated to verify the design theory.

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41

Chen, Lei, Xiao Yan Li, and Feng Wei. "A Balanced Tri-band PD Based on Microstrip-slotline Transition Structure Embedded Complementary Split-ring Resonators." Frequenz 72, no. 1-2 (December 20, 2017). http://dx.doi.org/10.1515/freq-2016-0198.

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AbstractA balanced tri-band equal power divider (PD) is proposed based on a balanced stepped-impedance microstrip-slotline transition structure in this paper. Multi-band differential-mode (DM) responses can be realized by embedding multiple complementary split-ring resonators (CSRRs) into the slotline resonator. It is found that a high and wideband common-mode (CM) suppression can be achieved. Moreover, the center frequencies of the DM passbands are independent from the CM ones, which significantly simplifies the design procedure. In order to validate its practicalbility, a balanced PD with three DM passbands centred at 1.57, 2.5 and 3.5 GHz is fabricated and a good agreement between the simulated and measured results is observed. To our best knowledge, a balanced tri-band PD is the first ever reported.

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42

Xie, Peng, and Guang Ming Wang. "A Polarization Reconfigurable Slot Antenna with a Novel Switchable Feeding Network." Frequenz 72, no. 1-2 (December 20, 2017). http://dx.doi.org/10.1515/freq-2016-0375.

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AbstractA polarization reconfigurable slot antenna is proposed in this paper. The antenna consists of a microstrip line-to-slotline transition structure, two radiation slots and a switchable feeding network. The feeding network is a gradually changed ring slot with six switching diodes on it. By controlling the diodes states, the antenna can generate y-direction polarization, z-direction polarization, left-hand circular polarization and right-hand circular polarization. Detailed design considerations of the proposed antenna, simulated and measured results are presented and discussed. Measured results agree well with simulated. The results proved that the antenna can realize polarization reconfiguration effectively at 5 GHz.

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Lopez, Cristian Daniel, Mohamed Aniss Mebarki, Vincent Desmaris, Denis Meledin, Alexey Pavolotsky, and Victor Belitsky. "Wideband Slotline-to-Microstrip Transition for 210-375 GHz based on Marchand Baluns." IEEE Transactions on Terahertz Science and Technology, 2022, 1. http://dx.doi.org/10.1109/tthz.2022.3149413.

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Chen, Lei, Min Wang, Tian Tian Zhang, Jia Yi Peng, and Feng Wei. "A balanced tri-band BPF with high selectivity based on ASSLR." Frequenz, July 20, 2022. http://dx.doi.org/10.1515/freq-2022-0071.

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Abstract:

Abstract In this paper, a balanced second-order tri-band bandpass filter (BPF) with high selectivity is proposed. Three differential-mode (DM) passbands are formed by applying one pair of asymmetric short stub-loaded resonators (ASSLRs) and uniform impedance resonators (UIRs) into the design. Meanwhile, the frequencies and bandwidths of the DM passbands can be quasi-independently controlled by the lengths of resonators and the gaps between them. In addition, broadband common-mode (CM) suppression is achieved intrinsically without affecting the DM parts based on the U-type balanced stepped-impedance microstrip-slotline transition (BSIMST) structures, thereby simplifying the design procedure significantly. In order to validate the practicability, a balanced tri-band BPF operating at 1.8, 3.5 and 4.45 GHz is fabricated and designed. A good agreement between the simulated and measured results is observed.

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