Substrate Integrated Waveguide based dual‐band bandpass filter using split ring resonator and defected ground structure for SFCW Radar applications

2018 ◽  
Vol 28 (9) ◽  
Author(s):  
Keyur Mahant ◽  
Hiren Mewada
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Substrate Integrated Waveguide ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Split Ring ◽  
Radar Applications

Design and development of metamaterial bandpass filter for WLAN applications using circular split ring resonator

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gnanasekaran Revathi ◽  
Savarimuthu Robinson
Keyword(s):  
Return Loss ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Method Of Moment ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Split Ring ◽  
Filter Structure

Abstract In this paper, a metamaterial bandpass filter using Split Ring Resonators (SRR) is designed, analyzed, and developed for WLAN applications at 2.4 GHz frequency band. Here, metamaterial bandpass filters with and without Defected Ground Structure (DGS) are designed, analyzed and compared. The filter structure shows a considerable size reduction with 50% fractional bandwidth, quality factor of 2 and wide bandwidth. The simulation results of the proposed filters offered good insertion loss and return loss response. The filters have been modeled, fabricated and their performance has been evaluated using the Method Of Moment (MOM) based electromagnetic simulator IE3D. The dimensions of the proposed filter is 20 × 9 × 1.6 mm which is considerably reduced. The simulated and measured results projected that the proposed metamaterial filters are well suited for WLAN applications.

scholarly journals A miniature fractal-based dual-mode dual-band microstrip bandpass filter design

2014 ◽  
Vol 7 (2) ◽  
pp. 127-133 ◽  
Author(s):  
Mushtaq Alqaisy ◽  
Chandan Chakrabraty ◽  
Jawad Ali ◽  
Adam R.H. Alhawari
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Filter Design ◽  
Ground Plane ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Dual Mode ◽  
Split Ring ◽  
Compact Size

In this paper, a fractal-based complementary split-ring resonator (CSRR) has been introduced as a defected ground structure (DGS) in the ground plane of a dual-mode microstrip bandpass filter to produce a new compact filter with dual-band response. The conventional double square ring resonator structure is modified such that its inner ring is made with a fractal shape instead of a square. Measured and simulation results show that the resulting filter offers a dual passband response; the higher passband is attributed to the dual-mode microstrip ring structure, whereas the lower passband is as a result of the embedded CSRR DGS structure. In addition, the results show that the position of the lower passband could be varied, to a certain extent, without affecting the position of the higher passband by applying higher fractal iteration levels to the inner split ring. These features, together with the compact size the proposed filter offers, make it suitable for use in a wide variety of dual-band communication applications. Measured results, carried out on filter prototypes, have been found in agreement with those theoretically predicted.

Reduced Cross-Polarization Patch Antenna with Optimized Impedance Matching Using a Complimentary Split Ring Resonator and Slots as Defected Ground Structure

2021 ◽  
Vol 36 (6) ◽  
pp. 718-725
Author(s):  
Narayanasamy RajeshKumar ◽  
Palani Sathya ◽  
Sharul Rahim ◽  
Akaa Eteng
Keyword(s):  
Patch Antenna ◽  
Ring Resonator ◽  
Impedance Matching ◽  
Equivalent Circuit Model ◽  
Split Ring Resonator ◽  
Cross Polarization ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Split Ring ◽  
Surface Current Density

An innovative method is proposed to improve the cross-polarization performance and impedance matching of a microstrip antenna by integrating a complimentary split ring resonator and slots as a defected ground structure. An equivalent circuit model (ECM) enables the design take into consideration the mutual coupling between the antenna patch and the Defected Ground Structure. The input impedance and surface current density analysis confirms that the integration of a CSRR within a rectangular microstrip patch antenna leads to uniform comparative cross-polarization level below 40 dB in the H-plane, over an angular range of ± 50°. Introducing parallel slots, as well, leads to a reduction of spurious antenna radiation, thereby improving the impedance matching. Measurements conducted on a fabricated prototype are consistent with simulation results. The proposed antenna has a peak gain of 4.16 dB at 2.6 GHz resonating frequency, and hence is good candidate for broadband service applications.

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