Compact UWB signal interference filter using interdigital coupled lines

Zhang, Y; Luo, Yonglun; Xin, Zhen-yu

doi:10.1109/icept.2014.6922876

Cited by 2 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The formula for determining the characteristic impedance of interdigital parallel-coupled lines is as follows 20 :…”

Section: Z Z Zmentioning

confidence: 99%

“…In signal interference theory, the input signal is split into two branches, one for propagation and one for interference, with each branch having its own distinctive phase and amplitude. 20 One of these branches is used for transmission, and the other is used for interference. After that, transmission and reflection zeros are created as a result of the interference of signals inside the band and the cancellation of signals outside the band.…”

Section: Filter Synthesis Of the Proposed Designmentioning

confidence: 99%

“…To accomplish impedance matching, the correlation between the reference impedances of the input transmission lines Z n also Z 1 and Z 2 may be described by the following equation 20 :…”

Section: Filter Synthesis Of the Proposed Designmentioning

confidence: 99%

“…This model comprises two lines of varied electrical lengths and characteristic impedances. In signal interference theory, the input signal is split into two branches, one for propagation and one for interference, with each branch having its own distinctive phase and amplitude 20 . One of these branches is used for transmission, and the other is used for interference.…”

Section: Proposed Design Configurationmentioning

confidence: 99%

“…The two electrical lengths,

{\theta }_{1}

and

{\theta }_{2}

, determine the fundamental frequency,

{f}_{0}

. The passband of the filter is formed using the following equation for

{\theta }_{1}

and

{\theta }_{2}

20 :

{{\rm{\Theta }}}_{1}({f}_{0})-{{\rm{\Theta }}}_{2}({f}_{0})=2n\pi (n\in N).

…”

Section: Proposed Design Configurationmentioning

confidence: 99%

See 4 more Smart Citations

Impact of holes in an interdigital parallel folded coupled line‐based wideband bandpass filter for X‐band applications

Paul,

Bhargava,

Majumdar

2023

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this paper, a study on the effects of strategically implemented holes in a miniaturized wideband bandpass filter (BPF) utilizing interdigital folded coupled lines is presented. First, the BPF is designed to produce the passband by introducing a fold in the coupled lines. The passband is centered at 9.3 GHz (X‐band), catering to radar applications. Coupled lines connected to a modified U‐shaped transmission line comprise the filter's design configuration. The novelty of the design resides in incorporating drilled holes along the coupled lines, which generate perturbations and resonant effects, resulting in enhanced impedance variations and improved filter performance. With the aid of electromagnetic analysis and simulation software, the coupled lines, U‐shaped transmission lines, and drilled hole diameters are all optimized. Vector Network Analyzer performs all the measurements and draws the comparisons. An increment of 22.58% is seen in return loss as it increases from −24 to −32 dB, and the insertion loss shows an increase of 16.74%. The proposed filter has been subjected to analytical study, simulation, and implementation, which have confirmed its exceptional return loss, favorable insertion loss, and compact dimensions. The research results make a valuable contribution to the development of miniaturized wideband BPFs, specifically focusing on their use in radar systems. In such systems, the ability to accurately and efficiently filter signals is paramount. The design insights and performance improvements presented in this study have significant implications for broader applications in microwave engineering and communication systems.

show abstract

“…The formula for determining the characteristic impedance of interdigital parallel-coupled lines is as follows 20 :…”

Section: Z Z Zmentioning

confidence: 99%

Section: Filter Synthesis Of the Proposed Designmentioning

confidence: 99%

“…To accomplish impedance matching, the correlation between the reference impedances of the input transmission lines Z n also Z 1 and Z 2 may be described by the following equation 20 :…”

Section: Filter Synthesis Of the Proposed Designmentioning

confidence: 99%

Section: Proposed Design Configurationmentioning

confidence: 99%

“…The two electrical lengths,