DocumentCode :
3850984
Title :
A Tunable Differential All-Pass Filter for UWB True Time Delay and Phase Shift Applications
Author :
AhmetÇağr Ulusoy;Bernd Schleicher;Hermann Schumacher
Author_Institution :
Institute of Electron Devices and Circuits, Ulm University, Ulm, Germany
Volume :
21
Issue :
9
fYear :
2011
Firstpage :
462
Lastpage :
464
Abstract :
In this work, we present a differential all-pass filter realized in a SiGe HBT technology that can be used for ultra wide band phase and delay shift applications. As a delay shift element, the circuit exhibits a tunable group delay of 50 to 75 ps within a bandwidth of 10 GHz, which is the largest delay amount reported to date for a single active delay cell over such a large bandwidth. A second version of the filter, modified to be used as a phase shifter, shows a tunable phase shift of 170° at 5 GHz. The circuit is highly linear and has an input 1 dB compression point of -1 dBm, consuming 38.8 mW from a 2.5 V dc supply.
Keywords :
"Delay","Tuning","Phase shifters","Bandwidth","Voltage measurement","Frequency measurement","Capacitors"
Journal_Title :
IEEE Microwave and Wireless Components Letters
Publisher :
ieee
ISSN :
1531-1309
Type :
jour
DOI :
10.1109/LMWC.2011.2162613
Filename :
5982122
Link To Document :
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