An ultra wideband “ OM ” shaped DRA with a defected ground structure and dual polarization properties for 4G / 5G wireless communications

2020 ◽  
Vol 30 (8) ◽  
Author(s):  
Sachin Kumar Yadav ◽  
Amanpreet Kaur ◽  
Rajesh Khanna
Keyword(s):  
Wireless Communications ◽  
Ultra Wideband ◽  
Defected Ground Structure ◽  
Dual Polarization ◽  
Ground Structure

A compact ultra-wideband band-pass filter with defected ground structure

2009 ◽  
Vol 51 (4) ◽  
pp. 979-981 ◽  
Author(s):  
Peng Chen ◽  
Feng Wei ◽  
Xiaowei Shi ◽  
Qiulin Huang
Keyword(s):  
Ultra Wideband ◽  
Band Pass Filter ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Band Pass

scholarly journals TREE Shape Micro-Strip Antenna using Stack Layer DGS

2019 ◽  
Vol 8 (9S) ◽  
pp. 938-943
Keyword(s):  
Impedance Matching ◽  
Wide Band ◽  
Tree Structure ◽  
Ultra Wideband ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Performance ◽  
Communication Devices ◽  
L Band ◽  
Portable Communication

This paper describes a tree structure antenna with defected ground structure & CPW feeding. In this proposed antenna, Swasthik layer defected ground structure has been considered to achieve wide-band & ultra-wideband (UWB) characteristics for impedance matching. The simulation bandwidth matching from S11<-10dB and frequency from 5GHz-20GHz. The Swasthik shape antenna is designed for the enhancement of multiband frequency applicable for L-band, D-band & SHF-band. The antenna performance evaluating the dense antenna that is applicable for portable communication devices.

Planar microstrip UWB bandpass filter with quad notched bands and high selectivity

2021 ◽  
Vol 14 ◽  
Author(s):  
Mingming Gao ◽  
Keda Xu ◽  
Jingchang Nan ◽  
Li Wang
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
The Other ◽  
Ultra Wideband ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Notched Band ◽  
Quad Notched Bands ◽  
Mode Resonator ◽  
Insufficient Number

Background: Aiming at solving the problems of large design size and insufficient number of notched band for traditional ultra-wideband (UWB) filters, a planar compact microstrip UWB bandpass filter (BPF) with quad notched bands and good selectivity is proposed using a modified multiple-mode resonator (MMR) and defected ground structure (DGS). Methods: The MMR consists of a stepped impedance stub above and two pairs of open-circuited stubs on both sides, which c an generate the passband and double notched bands of UWB filter, the other two notched bands are obtained by DGS. Results: The UWB filter with quad notched bands respectively centered at 3.9GHz, 5.7GHz, 7.9GHz, and 9.8GHz is fabricated and measured. Conclusion: The measured results are basically consistent with the simulated results, which proves the correctness and practicability of the UWB filter.

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