Dual-band bandpass filters with multiple transmission zeros using λ/4 stepped-impedance resonators

2018 ◽  
Vol 29 (1) ◽  
pp. e21469
Author(s):  
Kuan Deng ◽  
Zhengyu Chen ◽  
Guobing Hu ◽  
Wenjie Feng
Keyword(s):  
Bandpass Filters ◽  
Dual Band ◽  
Transmission Zeros ◽  
Multiple Transmission

Compact dual‐mode dual‐band HMSIW bandpass filters using source–load coupling with multiple transmission zeros

2019 ◽  
Vol 55 (4) ◽  
pp. 210-222 ◽  
Author(s):  
Wangshuxing Ieu ◽  
Dongfang Zhou ◽  
Dewei Zhang ◽  
Dalong Lv
Keyword(s):  
Bandpass Filters ◽  
Dual Band ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Multiple Transmission

Miniaturized Dual-Band Bandpass Filter Using Embedded Dual-Mode Resonator with Controllable Bandwidths

Frequenz ◽  
2016 ◽  
Vol 70 (9-10) ◽  
Author(s):  
Chuanming Zhu ◽  
Jin Xu ◽  
Wei Kang ◽  
Zhenxin Hu ◽  
Wen Wu
Keyword(s):  
Insertion Loss ◽  
Degrees Of Freedom ◽  
Bandpass Filter ◽  
The Other ◽  
Dual Band ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Low Insertion Loss ◽  
Multiple Transmission ◽  
Mode Resonator

AbstractIn this paper, a miniaturized dual-band bandpass filter (DB-BPF) using embedded dual-mode resonator (DMR) with controllable bandwidths is proposed. Two passbands are generated by two sets of resonators operating at two different frequencies. One set of resonators is utilized not only as the resonant elements that yield the lower passband, but also as the feeding structures with source-load coupling to excite the other to produce the upper passband. Sufficient degrees of freedom are achieved to control the center frequencies and bandwidths of two passbands. Moreover, multiple transmission zeros (TZs) are created to improve the passband selectivity of the filter. The design of the filter has been demonstrated by the measurement. The filter features not only miniaturized circuit sizes, low insertion loss, independently controllable central frequencies, but also controllable bandwidths and TZs.

Dual-Band 3-D Frequency Selective Surface With Multiple Transmission Zeros

2019 ◽  
Vol 18 (4) ◽  
pp. 596-600 ◽  
Author(s):  
Jianping Zhu ◽  
Zhongyin Hao ◽  
Cheng Wang ◽  
Zhengyong Yu ◽  
Cheng Huang ◽  
...  
Keyword(s):  
Frequency Selective Surface ◽  
Band 3 ◽  
Dual Band ◽  
Transmission Zeros ◽  
Frequency Selective ◽  
Multiple Transmission

scholarly journals High Selectivity Dual-Band Bandpass Filter with Tunable Lower Passband

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Wei-Qiang Pan ◽  
Xiao-Lan Zhao ◽  
Yao Zhang ◽  
Jin-Xu Xu
Keyword(s):  
High Selectivity ◽  
Bandpass Filter ◽  
Bandpass Filters ◽  
Dual Band ◽  
Transmission Zeros ◽  
Resonant Modes ◽  
Novel Method ◽  
Good Agreement ◽  
Tunable Bandpass Filter

This paper presents a novel method to design dual-band bandpass filters with tunable lower passband and fixed upper passband. It utilizes a trimode resonator with three controllable resonant modes. Discriminating coupling is used to suppress the unwanted mode to avoid the interference. Varactors are utilized to realize tunable responses. The bandwidth of the two bands can be controlled individually. Transmission zeros are generated near the passband edges, resulting in high selectivity. For demonstration, a tunable bandpass filter is implemented. Good agreement between the prediction and measurement validates the proposed method.

A Dual-Band Waveguide Bandpass Filter with Adjustable Transmission Zeros

2018 ◽  
Vol 27 (07) ◽  
pp. 1850100 ◽  
Author(s):  
Amit Bage ◽  
Sushrut Das
Keyword(s):  
Bandpass Filter ◽  
Transverse Plane ◽  
Dual Band ◽  
Center Frequency ◽  
Independent Control ◽  
Transmission Zeros ◽  
Rejection Level ◽  
Multiple Transmission

This paper presents a planar insert-loaded compact, dual-pole, dual-band, waveguide bandpass filter with adjustable multiple transmission zeros. Two identical inserts are placed on the transverse plane of a standard WR-90 waveguide at 8.41[Formula: see text]mm distance to achieve the filter characteristics. The insert consists of a stub-loaded C-shaped resonator and two asymmetric slot resonators. Two stub-loaded C-shaped resonators have been used to achieve dual-pole, dual-band response whereas the asymmetric slot pairs have been used to introduce transmission zeros. The structure allows independent control of the center frequencies of the passbands and transmission zeros, which is useful to control the rejection level of out-of-band signals without disturbing the center frequency. Measured result shows a dual-pole, dual-band, bandpass response with center frequencies at 8.81[Formula: see text]GHz and 10.9[Formula: see text]GHz, the respective 3[Formula: see text]dB bandwidths of 0.276[Formula: see text]GHz and 0.398[Formula: see text]GHz and transmission zeros at 8.02, 8.5, 9.46, 10.13, 11.53 and 12 GHz.

Compact microstrip dual-band bandpass filter with multiple transmission zeros

2013 ◽  
Vol 27 (7) ◽  
pp. 930-937 ◽  
Author(s):  
Biao Wang ◽  
Xiao-Hua Wang ◽  
Bing-Zhong Wang ◽  
Hualiang Zhang
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Transmission Zeros ◽  
Multiple Transmission
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