Journal ArticleDOI
Design of High-Order Wideband Planar Balun Filter in $S$ -Plane Bandpass Prototype
TLDR
A new high-order wideband planar balun filter is proposed in this paper, exact synthesized based on S-domain bandpass prototype using Richards' Theorem to fit the user-defined specifications.Abstract:
A new high-order wideband planar balun filter is proposed in this paper. The balun filter is exact synthesized based on S-domain bandpass prototype using Richards' Theorem to fit the user-defined specifications. By analyzing the redundant element in the equivalent circuit, the output impedance of the balun filter can be arbitrarily assigned. To use an S-plane bandpass prototype other than a high-pass prototype can shrink the circuit area and improve the stopband performance. The lumped capacitor approximation suppresses the spurious response in the stopband and further reduces the circuit size. A high-order balun filter with a bandwidth of 100% and a reflection coefficient of -15 dB is implemented by combining of microstrip lines, slotlines, and coplanar striplines. The simulation and measurement results match well.read more
Citations
More filters
Journal ArticleDOI
Synthesis Theory of Ultra-Wideband Bandpass Transformer and its Wilkinson Power Divider Application With Perfect in-Band Reflection/Isolation
TL;DR: A synthesis theory of ultra-wideband (UWB) bandpass (BP) transformer with short-circuited stubs is proposed, and a UWB BP type Wilkinson power divider can be easily designed.
Journal ArticleDOI
Novel Reconfigurable Single-to-Balanced, Power-Dividing, and Single-Ended Filter With Frequency and Bandwidth Control
TL;DR: In this paper, a novel tunable filter with reconfigurable single-to-balanced (SE-BAL), power dividing (PD), and singleto-single-ended (SE) filtering functionalities is proposed, for the first time, without any additional switching circuit.
Journal ArticleDOI
Wideband Balanced-to-Unbalanced Bandpass Filters Synthetically Designed With Chebyshev Filtering Response
TL;DR: Two wideband balanced-to-unbalanced (balun) bandpass filters (BPFs) are synthetically designed with three- and four-pole filtering responses, respectively, and their theoretical and simulated results are well confirmed by the circuit model responses with the same impedance values of the simulated microstrip and slotline resonators and the extracted turns ratios of the employed transformers.
Journal ArticleDOI
A New Approach to Design a Microstrip Dual-Mode Balun Bandpass Filter
Feng Huang,Jianpeng Wang,Lei Zhu +2 more
TL;DR: In this article, a planar dual-mode balun bandpass filter (BPF) was proposed for 2.0 GHz with 0.35 dB magnitude imbalance and 5 $^{\circ}$ phase imbalance.
Journal ArticleDOI
Compact $X$ -Band Filter Based on Substrate Integrated Coaxial Line Stubs Using Advanced Multilayer PCB Technology
TL;DR: In this paper, a third-order filter based on SICL stubs was designed using an advanced multilayer printed circuit board (PCB) substrate, which is convenient to implement high-density interconnect (HDI) devices, which are dedicated to mass market and require to be compact and low cost.
References
More filters
Journal ArticleDOI
General Theory and Design of Optimum Quarter-Wave TEM Filters
M. C. Horton,R.J. Wenzel +1 more
TL;DR: In this paper, the exact synthesis and design of a broad class of quarter-wave TEM mode filters is presented in a three-step procedure, which is applicable to all microwave filter forms consisting entirely of a cascade of quarterwave lines, quarterwave stubs, and coupled quarter wave lines.