By Topic

Design of SPDT Switch, 6 Bit Digital Attenuator, 6 Bit Digital Phase Shifter for L-Band T/R Module using 0.7 μM GaAs MMIC Technology

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Doddamani, N.D. ; Dept. of Electron. & Commun., B.V.Bhoomaraddi Coll. of Eng. & Tech., Hubli ; Harishchandra ; Nandi, A.V.

The performance of modern radar systems with active phased array antennas is mainly driven by the performance of the microwave T/R modules. To reduce the size, weight, cost and power consumption, as well as to achieve better phase and amplitude accuracies for realizing low sidelobe levels with an accurate beam steering, T/R modules, now-a-days, employ MMICs (monolithic microwave integrated circuits) for implementing transmit/receive chain. The L-band SPDT switch, 6-bit digital attenuator, 6-bit digital phase shifter have been designed using GAETEC Hyderabad 0.7 μm GaAs MESFET switch model to handle 30 dBm peak power. All the above components have been designed and simulated using Agilent ADS CAD tool interfaced with Academy Layout. The SPDT switch with insertion loss less than -1 dB, isolation greater than 60 dB and return loss better than 20 dB has been realized on a single 3.0 mm × 2.35 mm GaAs chip. A 6-bit digital attenuator has a 31.5 dB attenuation range in 0.5 dB increments; 2.5° phase error and return loss better than 15 dB. The 6 bits are cascaded to form a complete attenuator on a double 3.5 mm × 2.35 mm GaAs chip with 3 attenuator bits in each for a better yield. A 6-bit digital phase shifter with 9 dB insertion loss, return loss better than 15 dB has been realized on a two GaAs chips with size 4.0 mm × 2.35 mm and 3.0 mm × 2.35 mm and 3 phase bits in each chip for the better yield

Published in:

Signal Processing, Communications and Networking, 2007. ICSCN '07. International Conference on

Date of Conference:

22-24 Feb. 2007