Coupled microstrip line bandpass filter with harmonic suppression using right-angle triangle grooves

2009 ◽  
Vol 51 (10) ◽  
pp. 2313-2318 ◽  
Author(s):  
Ashraf S. Mohra
Keyword(s):  
Microstrip Line ◽  
Bandpass Filter ◽  
Harmonic Suppression

scholarly journals A Wide Stopband Balun Bandpass Filter with Its Application to Balanced Quasi-Yagi Antenna

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Gang Zhang ◽  
Zhenyao Qian ◽  
Yushou Chen ◽  
Yang Zhao
Keyword(s):  
Microstrip Line ◽  
Bandpass Filter ◽  
Harmonic Suppression ◽  
Fractional Bandwidth ◽  
Central Frequency ◽  
Half Wavelength ◽  
Yagi Antenna ◽  
Wave Distribution ◽  
Operating Bandwidth ◽  
Triple Mode

A new microstrip balun bandpass filter (BPF) with wide stopband is presented. It is realized by utilizing the out-of-phase feature of standing-wave distribution on a half-wavelength (λ/2) open-ended microstrip line and the resonant characteristics of the triple-mode resonators. For demonstration, a prototype balun BPF operating at central frequency (f0) of 2.34 GHz with fractional bandwidth (FBW) of about 16.7% is designed. The presented balun BPF not only exhibits nice balanced response with 0.47 dB magnitude imbalance and 4.3° phase difference but also achieves 30-dB harmonic suppression up to 6.40 GHz (2.7f0). Afterward, this presented design is embedded into a balanced quasi-Yagi antenna to obtain high-selective radiation and wide stopband rejection. Experimental results of the implemented antenna indicate less than −10 dB reflection coefficient, 4.49–5.38 dBi gain, and 12.71–19.62 dB front-to-back ratio within the operating bandwidth.

Compact LowPass Filter with Wide StopBand Using Non-Uniform Microstrip Resonant Cells

2012 ◽  
Vol 263-266 ◽  
pp. 15-19
Author(s):  
Yan Liang ◽  
Xiao Ming Wu ◽  
Bi Hua Tang ◽  
Yong Le Wu
Keyword(s):  
Microstrip Line ◽  
Photonic Bandgap ◽  
Impedance Matching ◽  
Stop Band ◽  
Cutoff Frequency ◽  
Harmonic Suppression ◽  
Lowpass Filter ◽  
Measurement Results ◽  
Better Than

In this paper, a novel compact microstrip lowpass filter is designed. The proposed filter which is etched on the 50 Ω microstrip line consists of four non-uniform 1-D microstrip photonic bandgap (PBG) cells with different cutoff frequency.. The demonstration lowpass filter with 2.2 GHz cutoff frequency is designed, fabricated and measured. The measurement results show that the band rejection effect is better than -20 dB from 2.8 GHz to 10 GHz, the insertion is less than 2 dB, and the length of filter is 5.6 cm long. Compared with the conventional filter, the proposed filter has smaller size. Meanwhile, it overcomes the problems of narrow stop-band and low harmonic suppression. Furthermore, the impedance matching is not need to be considered. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

scholarly journals Harmonic Suppression Improvement of Microstrip Open Loop Ring Resonator Bandpass Filter

2011 ◽  
Vol 8 ◽  
pp. 19-24 ◽  
Author(s):  
Nopparat Thammawongsa ◽  
Ravee Phromloungsri ◽  
Krissanapong Somsuk ◽  
Pichai Arunvipas
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Open Loop ◽  
Harmonic Suppression ◽  
Loop Ring
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