A hairpin DGS resonator for application to microstrip lowpass filters

Chen, Rong-Bin; Ou, Xiao-Ou

doi:10.2478/jee-2020-0016

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…Figure A shows the proposed MTM unit cell. The suggested subwavelength MTM is based on an initial symmetrical split ring resonator DGS layout, which is designed and characterized as a lowpass filter . This MTM structure is implemented by etching the double slit complementary split ring resonator (DS‐CSRR) on a microstrip line ground plane.…”

Section: Design and Analysis Of Eng Mtm Resonatormentioning

confidence: 99%

Isolation enhancement of rectangular dielectric resonator antennas using wideband double slit complementary split ring resonators

Rezapour

Rashed-Mohassel

Keshtkar

et al. 2019

Int J RF Microw Comput Aided Eng

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A wideband epsilon-negative structure is employed as one-layer and two-layer isolators to reduce mutual coupling in multiple-input multiple-output systems composed of two E-coupled rectangular dielectric resonator antennas. The proposed unit cell with −15 dB bandwidth for S 21 extending from 1970 to 3317 MHz, is a double slit complementary split ring resonator etched on the ground plane of a stripline. Each layer is composed of a 2 × 3 array of the suggested unit cell. Reduction in isolation of more than 11 dB for the one-layer case and higher than 20 dB for the two-layer case are measured within the frequency range of 2.604 to 2.64 GHz which includes WiMAX. The highest isolation level of 36 dB is realized at 2.868 GHz. The impedance matching, gain, radiation efficiency, and envelope correlation are improved compared to the original case. A prototype is designed, fabricated, and tested. Simulation data and measurement results are in good agreement.

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Section: Design and Analysis Of Eng Mtm Resonatormentioning

confidence: 99%

Isolation enhancement of rectangular dielectric resonator antennas using wideband double slit complementary split ring resonators

Rezapour

Rashed-Mohassel

Keshtkar

et al. 2019

Int J RF Microw Comput Aided Eng

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“…In [6], an accurate model of a rectangular bracket DGS was presented and further validated by cascaded two and three DGS cells. In [7], the hairpin shaped DGS was studied and further developed for microwave filter applications. The developed demonstrator achieved a compact size and wide stopband suppression.…”

Section: Introductionmentioning

confidence: 99%

Design of microwave lowpass filter based on log periodic zigzag DGS

Chen

et al. 2020

Journal of Electrical Engineering

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This contribution presents, for the first time, the design of microwave lowpass filter with ultrawide stopband and low insertion loss based on the log-periodic zig-zag defected ground structure (DGS); the design is specifically evolved from the principle of the log-periodic line antenna and the slotline based DGS. Based on the log-periodic property, studies show that ultra-wideband suppression can be realized by increasing the flare angle or the angle subtended by each element of the slotline DGS. The developed filter therefore shows low insertion loss of 0.7 dB within the passband, sharp transition between the passband and the stopband and ultra-wide suppression band from 2.61-26.5 GHz with a 20 dB suppression level. The DGS architecture is simple and easy to realize, and the design is thus useful in many microwave applications. The fabricated prototype filter validates the study, both from simulations and from measurements.

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