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|Title: ||Broadband differential fed integrated antenna|
|Other Titles: ||Kuan pin cha dong zong he tian xian|
|Authors: ||Mok, Siu Yee Noyes (莫肇怡)|
|Department: ||Department of Electronic Engineering|
|Degree: ||Master of Philosophy|
|Issue Date: ||2008|
|Publisher: ||City University of Hong Kong|
|Subjects: ||Microstrip antennas.|
Broadband communication systems.
|Notes: ||CityU Call Number: TK7871.67.M5 M65 2008|
viii, 91 leaves : ill. 30 cm.
Thesis (M.Phil.)--City University of Hong Kong, 2008.
Includes bibliographical references.
|Abstract: ||Modern ICs used in mobile communications nowadays use differential (balanced)
signals for high-speed data transmission. Use of differential signals reduces
common-mode interference in particular those due to radiation, thus giving better
immunity. The use of differential signals has extended to RF, however the RF front
ends usually use a balun to convert the balanced signal to an unbalanced signal for
amplification or to drive a normal single-ended antenna for radiation. One of the
reasons for this is that most front-end components are designed with single ended
Past works show that the push-pull configuration combined with a differential feed
antenna can eliminate the need of a balun. However, these previous works can only
operate over narrow bands which are not suited for today’s broadband mobile
communication systems, or future systems that may use software defined radios. The
work presented in this thesis uses the push-pull distributed amplifier integrated with a
broadband antenna to realize an active integrated antenna. This integrated antenna not
only provides broadband amplification, but also directly combines the differential
output signal in space.
The research work presented in this thesis show that a broadband differential fed integrated antenna with signal combination in space can be realized. The resultant
integrated antenna can give a gain of about 13dBi from 0.9GHz to 2.3GHz with a 2nd
harmonic suppression of around 30dB. This integrated antenna configuration can
improve the efficiency as well as simplifying the front-end of a wideband mobile unit
and is all achieved without the need of baluns.|
|Online Catalog Link: ||http://lib.cityu.edu.hk/record=b2340718|
|Appears in Collections:||EE - Master of Philosophy |
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