A Balanced Tri-band PD Based on Microstrip-slotline Transition Structure Embedded Complementary Split-ring Resonators

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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Tunable balanced to balanced filtering power divider with high common-mode suppression

Frequenz ◽

10.1515/freq-2019-0178 ◽

2020 ◽

Vol 74 (7-8) ◽

pp. 263-270

Author(s):

Cao Zeng ◽

Xue Han Hu ◽

Feng Wei ◽

Xiao Wei Shi

Keyword(s):

Return Loss ◽

High Selectivity ◽

Power Divider ◽

Center Frequency ◽

Differential Mode ◽

Common Mode ◽

Mode Suppression ◽

The Common ◽

Equal Power ◽

Good Agreement

AbstractIn this paper, a tunable balanced-to-balanced in-phase filtering power divider (FPD) is designed, which can realize a two-way equal power division with high selectivity and isolation. A differential-mode (DM) passband with a steep filtering performance is realized by applying microstrip stub-loaded resonators (SLRs). Meanwhile, six varactors are loaded to the SLRs to achieve the center frequency (CF) and bandwidth adjustment, respectively. U-type microstrip lines integrated with stepped impedance slotline resonators are utilized as the differential feedlines, which suppress the common-mode (CM) intrinsically, making the DM responses independent of the CM ones. A tuning center frequency from 3.2 to 3.75 GHz and a fractional bandwidth (12.1–17.6%) with more than 10 dB return loss and less than 2.3 dB insertion loss can be achieved by changing the voltage across the varactors. A good agreement between the simulated and measured results is observed. To the best of authors' knowledge, the proposed balanced-to-balanced tunable FPD is first ever reported.

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A Balanced Dual-Band BPF with High CM Suppression and Improved Selectivity

Frequenz ◽

10.1515/freq-2018-0243 ◽

2019 ◽

Vol 73 (7-8) ◽

pp. 261-265

Author(s):

Feng Wei ◽

Hao-Jie Yue ◽

Xiao-Wei Shi

Keyword(s):

Design Procedure ◽

Ring Resonators ◽

Dual Band ◽

Design Strategies ◽

Differential Mode ◽

Split Ring ◽

Transmission Zeros ◽

Coupling Structure ◽

Transition Structures ◽

Good Agreement

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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Design and implementation of compact tri- and quad-band SIW power divider using modified circular complementary split-ring resonators

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721001720 ◽

2022 ◽

pp. 1-9

Author(s):

Tharani Duraisamy ◽

Selvajyothi Kamakshy ◽

Karthikeyan Sholampettai Subramanian ◽

Rusan Kumar Barik ◽

Qingsha S. Cheng

Keyword(s):

Ring Resonators ◽

Power Divider ◽

Operating Frequency ◽

Split Ring ◽

Split Ring Resonators ◽

Full Wave ◽

Different Types ◽

Working Principle ◽

Minimum Amplitude ◽

Equal Power

Abstract This paper presents a miniaturized tri- and quad-band power divider (PD)based on substrate integrated waveguide (SIW). By adopting different types of modified circular complementary split-ring resonators on the top surface of SIW, multiple passbands are generated propagating below the SIW cut-off frequency. The working principle is based on evanescent mode propagation that decreases the operating frequency of the PD and helps in the miniaturization of the proposed structure. The operating frequency of the proposed PD can be individually controlled by changing the dimensions of the resonator. To verify the proposed concept, a tri-band and a quad-band PD exhibiting 3 dB equal power division at 2.41/3.46/4.65 GHz and 2.42/3.78/4.74/5.8 GHz are designed using the full-wave simulator, validated through circuit model, fabricated and experimentally verified. The measured results agree well with the simulations. The proposed PDs have good performance in terms of reasonable insertion loss, isolation, minimum amplitude and phase imbalance, smaller footprint, easy fabrication and integration. The size of the fabricated prototype is 18.3 mm × 8.4 mm, which corresponds to 0.205λ g × 0.094λ g , λ g being the guided wavelength at the first operating frequency.

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A Balanced Dual-Band BPF Based on C-CSRR with Improved Passband Selectivity

Frequenz ◽

10.1515/freq-2018-0239 ◽

2019 ◽

Vol 73 (5-6) ◽

pp. 203-208

Author(s):

Lei Chen ◽

Qin Kun Xiao ◽

Yan Ni Gan

Keyword(s):

Bandpass Filter ◽

Ring Resonator ◽

Design Procedure ◽

Split Ring Resonator ◽

Ring Resonators ◽

Dual Band ◽

Differential Mode ◽

Split Ring ◽

Complementary Split Ring Resonator ◽

Good Agreement

Abstract A balanced dual-band bandpass filter (BPF) is proposed by embedding two nested coupled complementary split-ring resonators (C-CSRRs) into a H-type balanced stepped-impedance slotline resonator in this paper. C-CSRR is composed of a complementary split-ring resonator (CSRR) with a pair of coupling slotlines in the open end, which can generate a bandpass response. In order to improve the passband selectivity further, source-load-coupled structure is employed. Moreover, it can be found that the proposed BPF has a wideband common-mode (CM) suppression, which is independent from the differential-mode (DM) passbands. Therefore, the design procedure can be significantly simplified. In order to validate its practicalbility, one balanced dual-band BPF is fabricated. The predicted results on S parameters are compared with the measured ones and a good agreement is found.

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Miniaturized filtering SIW power divider with arbitrary power-dividing ratio loaded by open complementary split-ring resonators

International Journal of Microwave and Wireless Technologies ◽

10.1017/s175907871700071x ◽

2017 ◽

Vol 9 (9) ◽

pp. 1827-1832 ◽

Cited By ~ 7

Author(s):

Mostafa Danaeian ◽

Ali-Reza Moznebi ◽

Kambiz Afrooz ◽

Ahmad Hakimi

Keyword(s):

Design Procedure ◽

Size Reduction ◽

Ring Resonators ◽

Power Divider ◽

Substrate Integrated Waveguide ◽

Split Ring ◽

Split Ring Resonators ◽

Power Dividers ◽

Arbitrary Power ◽

Filter Response

A miniaturized substrate-integrated waveguide (SIW) power divider with embedded filter response and arbitrary power-dividing ratio loaded by open complementary split-ring resonators (OCSRRs) is presented. In the proposed power divider, the miniaturization and filtering response are realized by a pair of OCSRRs, which are etched on the metal cover of the SIW structure. The design procedure indicates that the power division ratio can be adjusted by changing the locations of the output ports. In this study, three miniaturized filtering SIW power dividers with different power division ratios (1:1, 1:4, and 1:8) are implemented to evaluate the performance of the proposed structure on the size reduction. These power dividers (1:1, 1:4, and 1:8) have the overall sizes of 0.31λg × 0.14λg, 0.25λg × 0.17λg, and 0.25λg × 0.18λg, respectively. The measured results also agree well with the simulated results.

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A Novel SWB Antenna with Triple Band-Notches Based on Elliptical Slot and Rectangular Split Ring Resonators

Electronics ◽

10.3390/electronics8020202 ◽

2019 ◽

Vol 8 (2) ◽

pp. 202 ◽

Cited By ~ 4

Author(s):

Xiaobo Zhang ◽

Saeed Ur Rahman ◽

Qunsheng Cao ◽

Ignacio Gil ◽

Muhammad Irshad khan

Keyword(s):

Split Ring Resonator ◽

Ring Resonators ◽

Impedance Bandwidth ◽

Split Ring ◽

Split Ring Resonators ◽

Compact Size ◽

Good Agreement ◽

Swb Applications ◽

Triple Band ◽

Microstrip Feed

In this paper, a wideband antenna was designed for super-wideband (SWB) applications. The proposed antenna was fed with a rectangular tapered microstrip feed line, which operated over a SWB frequency range (1.42 GHz to 50 GHz). The antenna was implemented at a compact size with electrical dimensions of 0.16 λ × 0.27 λ × 0.0047 λ mm3, where λ was with respect to the lowest resonance frequency. The proposed antenna prototype was fabricated on a F4B substrate, which had a permittivity of 2.65 and 1 mm thickness. The SWB antenna exhibited an impedance bandwidth of 189% and a bandwidth ratio of 35.2:1. Additionally, the proposed antenna design exhibited three band notch characteristics that were necessary to eradicate interference from WLAN, WiMAX, and X bands in the SWB range. One notch was achieved by etching an elliptical split ring resonator (ESRR) in the radiator and the other two notches were achieved by placing rectangular split ring resonators close to the signal line. The first notch was tuned by incorporating a varactor diode into the ESRR. The prototype was experimentally validated with, with notch and without notch characteristics for SWB applications. The experimental results showed good agreement with simulated results.

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A Differential UWB Quasi-Yagi Antenna with A Reconfigurable Notched Band

Frequenz ◽

10.1515/freq-2018-0018 ◽

2018 ◽

Vol 72 (9-10) ◽

pp. 401-406 ◽

Cited By ~ 1

Author(s):

Feng Wei ◽

Xin Tong Zou ◽

Xin Yi Wang ◽

Bin Li ◽

Xi Bei Zhao

Keyword(s):

Microstrip Line ◽

Design Procedure ◽

Wide Band ◽

Impedance Bandwidth ◽

Differential Mode ◽

Transition Structure ◽

Notched Band ◽

Quarter Wavelength ◽

Yagi Antenna ◽

Good Agreement

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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A novel balanced-to-balanced power divider based on three-line coupled structure

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078718001708 ◽

2019 ◽

Vol 11 (2) ◽

pp. 139-142

Author(s):

Zhen Tan ◽

Qing-Yuan Lu ◽

Jian-Xin Chen

Keyword(s):

Equivalent Circuit ◽

Design Procedure ◽

Power Divider ◽

Equivalent Circuits ◽

Differential Mode ◽

Detailed Design ◽

Symmetrical Structure ◽

The Common ◽

First Time ◽

Good Agreement

AbstractThis paper presents a novel balanced-to-balanced power divider (PD) based on a simple and compact three-line coupled structure for the first time. By bisecting the proposed symmetrical structure, the differential mode (DM) and the common mode (CM) equivalent circuits can be obtained for analysis. The DM equivalent circuit exhibits a three-line in-phase power dividing response, and then a resistor is added between the two outputs for achieving good isolation. Meanwhile, the CM equivalent circuit shows a three-line all-stop response so that the CM suppression in this design does not need to be considered. Accordingly, the detailed design procedure of the DM PD is given. For demonstration, a prototype centered at 1.95 GHz is designed, fabricated, and measured. The simulated and measured results with good agreement are presented, showing low DM loss and wideband CM suppression.

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