High‐quality coplanar waveguide tunable band‐stop filter using defected ground structure and comb‐line resonator with radio frequency microelectromechanical system varactors

2020 ◽  
Vol 48 (9) ◽  
pp. 1436-1449
Author(s):  
S. Mehdi Mirebrahimi ◽  
Massoud Dousti ◽  
Saed Afrang
Keyword(s):  
Radio Frequency ◽  
Coplanar Waveguide ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
High Quality ◽  
Microelectromechanical System ◽  
Band Stop Filter

scholarly journals Design of a 1×2 CPW Fractal Antenna Array on Plexiglas Substrate with Defected Ground Plane for Telecommunication Applications

2021 ◽  
Vol 11 (6) ◽  
pp. 7897-7903
Author(s):  
C. Ben Nsir ◽  
J. M. Ribero ◽  
C. Boussetta ◽  
A. Gharsallah
Keyword(s):  
Antenna Array ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Systems Design ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Telecommunication Systems ◽  
Attractive Candidate

In this paper, a fractal antenna array for telecommunication applications is presented. The proposed antenna array is realized on a Plexiglas substrate, has 1×2 radiating elements, and dimensions of 170mm×105mm. The antenna array is composed of two Koch Snowflake patches and is fed by a Coplanar Waveguide (CPW) transmission line. Radiating elements and the ground plane are printed on the top side of the substrate. Defected Ground Structure (DGS) technique is employed to enhance the bandwidth and improve the impedance matching. The proposed antenna array operates at two frequency bands, 1.08-1.32GHz covering the GPS band and 1.7-3.7GHz covering the GSM 1800/1900, UTMS, Bluetooth, LTE, and WiMAX bands. In addition, the antenna has a good performance with efficiency and peak gain of 82% and 6.3dB respectively. These characteristics allow the antenna to be an attractive candidate for telecommunication systems. Design and analysis of different structures were carried out with Ansys HFSS.

Design of a K Band MEMS Switch with CPW Defected Ground Structure

2013 ◽  
Vol 397-400 ◽  
pp. 1844-1849
Author(s):  
Zhong Liang Deng ◽  
Cai Hu Chen ◽  
Sen Fan ◽  
Hua Gong ◽  
Xiao Fei Sun
Keyword(s):  
Defect Structure ◽  
Return Loss ◽  
Coplanar Waveguide ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Beam Structure ◽  
Electromechanical Systems ◽  
Mems Switch ◽  
Ground Line ◽  
K Band

This paper presents a K band (18GHz-26.5GHz) shunt capacitive micro-electromechanical systems (MEMS) switch. This switch used the coplanar waveguide (CPW) Defected ground structure (DGS) which is made by etching defect structure in CPW ground line. Furthermore the beam structure of the proposed switch is composed of one girder and two supporting beams. The design of the switchs structure is benefit to the apart between the DC signal and AC signal. The simulated values of the isolation of the switch on off-states is-55 dB at18.9 GHz, and the return loss at K band is greater than-0.3 dB. The pull-in voltage of the switch is 13.3 V.

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