Title :
Ultra broadband MMIC 5-bit time shifter
Author :
Ouacha, A. ; Carlegrim, B. ; Alfredson, M.
Author_Institution :
Defence Res. Establ., Linkoping, Sweden
fDate :
11/1/1999 12:00:00 AM
Abstract :
An ultra broadband (2-18 GHz) MMIC 5-bit time shifter based on a new concept for the two least significant bits is presented. The basic idea is to reduce the number of switches as compared to the conventional time shifter based on single pole double throw (SPDT) switches. This has an impact on the losses as well as on the circuit area of the time shifter. The 5-bit time shifter is designed for a corresponding delay in air between 1.5 and 46.5 mm and occupies an area of 3.90×1.95 mm 2
Keywords :
HEMT integrated circuits; beam steering; delay circuits; electronic warfare; field effect MMIC; integrated circuit layout; microwave switches; timing circuits; 2 to 18 GHz; EW systems; PHEMT process; beam steering element; circuit area; constant-R network; losses; self-switched delay network; single pole double throw switches; switch number reduction; two least significant bits; ultra broadband MMIC 5-bit time shifter; Capacitance; Circuits; Cutoff frequency; Delay effects; Impedance; Inductance; MMICs; Phase shifters; Radar applications; Switches;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.829789
