Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMTT.2012.2216892
Title: 180° and 90° Reflection-type phase shifters using over-coupled lange couplers
Authors: Fang, H.R.
Tang, X. 
Mouthaan, K. 
Guinvarc'H, R.
Keywords: Lange coupler
reflection-type phase shifter (RTPS)
Issue Date: 2012
Source: Fang, H.R., Tang, X., Mouthaan, K., Guinvarc'H, R. (2012). 180° and 90° Reflection-type phase shifters using over-coupled lange couplers. IEEE Transactions on Microwave Theory and Techniques 60 (11) : 3440-3448. ScholarBank@NUS Repository. https://doi.org/10.1109/TMTT.2012.2216892
Abstract: Reflection-type phase shifters (RTPSs) of 180° and 90° using over-coupled Lange couplers to obtain multioctave bandwidth are presented. A thorough theoretical analysis of the effect of coupler parameters on the RTPS performance is provided. The impact of coupler parameters on the RTPS performance is further illustrated with vector plots. Each measured phase shifter is comprised of an over-coupled Lange coupler, two low-loss single-pole double-throw switches, and two pairs of LC reflection loads on a Rogers RO4003C substrate with a thickness of 0.8 mm (32 mil) and 1.5 mm (60 mil). By using the 1.5-mm substrate, the coupling can be increased. Phase shifts of 90° and 180° using Lange couplers with 2-3-dB coupling in steps of 0.2 dB are designed, fabricated, and measured. The experimental results show that an over-coupling of 2.2 dB is able to obtain a return loss larger than 10 dB over a 127% bandwidth from 550 to 2450 MHz for all states. Worst case measured insertion loss and phase error on the 0.8-mm substrate with an over-coupling of 2.8 dB is 2.0 0.8 dB and 5.8 , respectively, for both 180 and 90 phase states. On the 1.5-mm substrate with an over-coupling of 2.4 dB, they are 1.8 1 dB and 16 , respectively, for both phase states. © 2012 IEEE.
Source Title: IEEE Transactions on Microwave Theory and Techniques
URI: http://scholarbank.nus.edu.sg/handle/10635/53849
ISSN: 00189480
DOI: 10.1109/TMTT.2012.2216892
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

8
checked on Dec 6, 2017

WEB OF SCIENCETM
Citations

8
checked on Nov 21, 2017

Page view(s)

62
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.