Referenced Items are not available for this document.
Design of High-Order Wideband Planar Balun Filter in 
-Plane Bandpass Prototype
Design of High-Order Wideband Planar Balun Filter in
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.
Published in:
Microwave Theory and Techniques, IEEE Transactions on
(Volume:60
,
Issue:
7
)
Date of Publication: July 2012
- Page(s):
- 2124 - 2130
- ISSN :
- 0018-9480
- INSPEC Accession Number:
- 12819511
- Digital Object Identifier :
- 10.1109/TMTT.2012.2193137
- Product Type:
- Journals & Magazines
- Date of Publication :
- 01 May 2012
- Date of Current Version :
- 26 June 2012
- Issue Date :
- July 2012
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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