Design of microstrip wide stopband lowpass filter with lumped equivalent circuit

2017 ◽  
Vol 53 (21) ◽  
pp. 1416-1418 ◽  
Author(s):  
A. Sheikhi ◽  
A. Alipour ◽  
H. Hemesi
Keyword(s):  
Equivalent Circuit ◽  
Lowpass Filter ◽  
Lumped Equivalent Circuit

Millimeter Wave Characterization of Wire Bond Transitions for W-Band Electromagnetic Sensor

2015 ◽  
Vol 738-739 ◽  
pp. 103-106
Author(s):  
Yong Fang ◽  
Bao Qing Zeng ◽  
Wen Tao Zhang ◽  
Pu Wang
Keyword(s):  
Equivalent Circuit ◽  
Millimeter Wave ◽  
Equivalent Circuit Model ◽  
Single Wire ◽  
Full Wave ◽  
Wire Bond ◽  
W Band ◽  
Electromagnetic Sensor ◽  
Simulation Results ◽  
Lumped Equivalent Circuit

This paper presents millimeter wave characterization and models of various wire bond transitions between chip’s ground-signal-ground pad (GSG) and microstrip (MS), include single-wire-nomatch MS-GSG transition, double-wire-nomatch MS-GSG, single-wire-match MS-GSG transition, and double-wire-match MS-GSG transition. It also presents the 3D full-wave electromagnetic simulation. Analysis results show that the double-wire-match MS-GSG transition’s characteristic is better than other three transitions in the whole W band. The accurate extracted parameter values are used for the lumped equivalent circuit model, whose simulation results are good with the full wave simulation results. The error between lumped equivalent circuit and full-wave models is of the order of ±0.2dB for S11 and S21 in the frequency range 75 - 105GHz. The proposed lumped equivalent circuit is suitable to be implemented in commercial microwave CAD tools for the electromagnetic sensor designing.

scholarly journals Dual-Band Bandpass Filter With Controllable Stopband Bandwidth

2022 ◽  
Vol 9 ◽  
Author(s):  
Nan Wang ◽  
Haokun Wei ◽  
Kun Gao ◽  
Xiting Ruan ◽  
Xiaojian Chen ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Bandpass Filter ◽  
Dual Band ◽  
Lowpass Filter ◽  
Microstrip Filter ◽  
Design Specifications ◽  
Transmission Zeros ◽  
Good Agreement

A novel dual-band bandpass filter (BPF) is proposed with independently controllable transmission zeros (TZs) which can realize widely tunable stopband bandwidth (BW). The planar microstrip filter consists of a three-degree L-C ladder lowpass filter loaded with two unsymmetrical shorted stubs which are used to produce different TZs. By tuning the parameters of the two unsymmetrical shorted stubs, the TZs can be independently controlled. Therefore, the BPF has independent controllable center frequencies (CFs), passband bandwidths, and stopband bandwidths between adjacent passbands. All the L-C values in the equivalent circuit of the proposed filter are optimized to fulfill the design specifications. For demonstration, a dual-band BPF is designed. The measured results show good agreement with the simulated ones.

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