Novel Dual-Band Bandpass Filters Using Short-Circuited Coupled-Line Resonator

2020 ◽  
Author(s):  
Wei Nie ◽  
Zhi Chao Han ◽  
Ying Hao Wang ◽  
Liang Bo Xie ◽  
Mu Zhou
Keyword(s):  
Bandpass Filters ◽  
Dual Band ◽  
Coupled Line

Non-Reciprocal MMIC-Based Dual-Band Bandpass Filters

2021 ◽  
Author(s):  
Andrea Ashley ◽  
Dimitra Psychogiou
Keyword(s):  
Bandpass Filters ◽  
Dual Band

A Dual-Band Coupled-Line Balun Filter

2007 ◽  
Vol 55 (11) ◽  
pp. 2406-2411 ◽  
Author(s):  
Lap Kun Yeung ◽  
Ke-Li Wu
Keyword(s):  
Dual Band ◽  
Coupled Line

Design of dual-band coupled-line balun

2011 ◽  
Author(s):  
Hualiang Zhang ◽  
Jin Shao ◽  
Song Tan ◽  
Kevin J. Chen
Keyword(s):  
Dual Band ◽  
Coupled Line

scholarly journals Beamwidth-Enhanced Low-Profile Dual-Band Circular Polarized Patch Antenna for CNSS Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Hongmei Liu ◽  
Chenhui Xun ◽  
Shaojun Fang ◽  
Zhongbao Wang
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Axial Ratio ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Coupled Line ◽  
Low Profile ◽  
Feed Network ◽  
Single Input ◽  
Half Power

A low-profile dual-band circular polarized (CP) patch antenna with wide half-power beamwidths (HPBWs) is presented for CNSS applications. Simple stacked circular patches are used to achieve dual-band radiation. To enhance the HPBW for the two operation bands, a dual annular parasitic metal strip (D-APMS) combined with reduced ground plane (R-GP) is presented. A single-input feed network based on the coupled line transdirectional (CL-TRD) coupler is also proposed to provide two orthogonal modes at the two frequency bands simultaneously. Experimental results show that the 10 dB impedance bandwidth is 32.7%. The 3 dB axial ratio (AR) bandwidths for the lower and upper bands are 4.1% and 6.5%, respectively. At 1.207 GHz, the antenna has the HPBW of 123° and 103° in the xoz and yoz planes, separately. And the values are 127° and 113° at 1.561 GHz.

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