Active integrated antenna with image reject mixer

Active integrated antenna (AIA) with image reject mixer (IRM ) operating at licenseless frequency of 2.4 GHz and intermediate frequency (IF) of 50 MHz is proposed. The opted IF of 50 MHz proves to yield satisfactory result in previous rather similar work. In this work, IRM is integrated with microst...

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Main Author:	Chong, Wah Kiat
Format:	Thesis
Language:	English
Published:	2006
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/257/1/ChongWahKiatMFKE2006.pdf
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id	my-utm-ep.257
record_format	uketd_dc
spelling	my-utm-ep.2572018-02-19T06:53:24Z Active integrated antenna with image reject mixer 2006-11 Chong, Wah Kiat TK Electrical engineering. Electronics Nuclear engineering Active integrated antenna (AIA) with image reject mixer (IRM ) operating at licenseless frequency of 2.4 GHz and intermediate frequency (IF) of 50 MHz is proposed. The opted IF of 50 MHz proves to yield satisfactory result in previous rather similar work. 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 at different phase manipulation approach from that of the previous research in which the RF signal from the antenna feed is initially fed to an 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 the image and desired frequency with 7 dBm LO drive at 2.35 GHz. The method of moment (MoM) and lumped circuit element simulation using Agilentâ€™s ADS software are employed in this work. The integral components of AIA with IRM consist of microstrip 2-elements patch antenna, singly balanced schottky diode mixers, low pass filter, branchline 900 hybrid coupler lumped element 900 coupler and 1800 rat race coupler. The purpose and significance of this research emerge from the disadvantages that superheterodyne receiver presents in achieving image suppression. Relatively, IRM can reasonably suppress image at a lower size, weight, complexity and cost by means of phase cancellation. The design of AIA with IRM requires the achievement of balance between several inevitable design trade-offs involved. Generally, the trade-offs in this design are between size, simplicity and performance 2006-11 Thesis http://eprints.utm.my/id/eprint/257/ http://eprints.utm.my/id/eprint/257/1/ChongWahKiatMFKE2006.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Chong, Wah Kiat Active integrated antenna with image reject mixer
description	Active integrated antenna (AIA) with image reject mixer (IRM ) operating at licenseless frequency of 2.4 GHz and intermediate frequency (IF) of 50 MHz is proposed. The opted IF of 50 MHz proves to yield satisfactory result in previous rather similar work. 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 at different phase manipulation approach from that of the previous research in which the RF signal from the antenna feed is initially fed to an 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 the image and desired frequency with 7 dBm LO drive at 2.35 GHz. The method of moment (MoM) and lumped circuit element simulation using Agilentâ€™s ADS software are employed in this work. The integral components of AIA with IRM consist of microstrip 2-elements patch antenna, singly balanced schottky diode mixers, low pass filter, branchline 900 hybrid coupler lumped element 900 coupler and 1800 rat race coupler. The purpose and significance of this research emerge from the disadvantages that superheterodyne receiver presents in achieving image suppression. Relatively, IRM can reasonably suppress image at a lower size, weight, complexity and cost by means of phase cancellation. The design of AIA with IRM requires the achievement of balance between several inevitable design trade-offs involved. Generally, the trade-offs in this design are between size, simplicity and performance
format	Thesis
qualification_level	Master's degree
author	Chong, Wah Kiat
author_facet	Chong, Wah Kiat
author_sort	Chong, Wah Kiat
title	Active integrated antenna with image reject mixer
title_short	Active integrated antenna with image reject mixer
title_full	Active integrated antenna with image reject mixer
title_fullStr	Active integrated antenna with image reject mixer
title_full_unstemmed	Active integrated antenna with image reject mixer
title_sort	active integrated antenna with image reject mixer
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2006
url	http://eprints.utm.my/id/eprint/257/1/ChongWahKiatMFKE2006.pdf
_version_	1747814350608924672

Active integrated antenna with image reject mixer

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