Universiti Teknologi Malaysia Institutional Repository

Active integrated antenna with image reject mixer design

Rahim, M. K. A. and Chong, W. K. and Masri, T. (2007) Active integrated antenna with image reject mixer design. In: 2nd European Conference On Antennas And Propagation (EuCAP2007), 2007, United Kingdom.

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Active integrated antenna with image reject mixer (AIA with IRM) operating at licenseless frequency of 2.4 GHz and intermediate frequency (IF) of 50 MHz is proposed. In this work, IRM is integrated with microstrip patch antenna on the similar substrate to attain size, weight and cost reduction. The suitable substrate that serves as the common platform for all integral components is FR-4 with dielectric constant of 4.7 and thickness of 1.6mm. This AIA with IRM employs a different phase manipulation approach from the previous research in which the RF signal from the antenna is initially fed to 1800 rat race coupler instead of a 900 coupler. Practically, this system is able to achieve image suppression with an isolation of approximately 20 dB between image and desired frequency with 7 dBm LO drive at 2.35 GHz. The integral components of AIA with IRM consist of 2-elements microstrip rectangular patch antenna, singly balanced schottky diode mixers, low pass filter, branch-line 900 hybrid coupler, lumped element 900 coupler and 1800 rat race coupler

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:active integrated antenna, image reject mixer, microstrip antenna, intermediate frequency, branch line couple
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:13718
Deposited By: Liza Porijo
Deposited On:11 Aug 2011 03:47
Last Modified:11 Aug 2011 03:47

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