Reconfigurable beam steering parasitic patch antenna with embedded PIN diode
The work described in this dissertation focuses on the reconfigurable beam steering antenna functionality for point-to-multipoint wireless communication application. This concept helps to reduce the antenna size, cost, and gives more flexibility for a customer premises equipment (CPE) to be opera...
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| Format: | Thesis |
| Language: | English |
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| Online Access: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31911/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31911/2/Full%20text.pdf |
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| Summary: | The work described in this dissertation focuses on the reconfigurable beam steering
antenna functionality for point-to-multipoint wireless communication application. This
concept helps to reduce the antenna size, cost, and gives more flexibility for a customer
premises equipment (CPE) to be operated in several modes. The studies involve the
microstrip patch antenna of low profile, low cost, ease of fabrication and easy to be
integrated with other RF components. Beam steering/forming antenna is useful in the
rapid growth of the wireless communication system such as Wireless Interoperability
Microwave Access (WiMAX) and Long Term Evolution (LTE). This dissertation
introduces the preliminary investigation on a single element reconfigurable patch
antenna which uses PIN diodes as the switching mechanism. With that, reconfigurable
pattern of an antenna is studied in depth. Then, the dissertation more focused on spiral
reconfigurabe beam antenna with aperture coupled feed technique designed on two
Taconic substrate with similar dielectric constant of 2.2. It is discovered that such
parasitic and mutual coupling technique is able to steer the radiating beam to four
different angles of +176°, +10°, -1° and -12°. Therefore, this dissertation continues on
designing another steerable beam antenna that uses similar technique of parasitic array
and mutual coupling method. (Parasitic element is the element that undirectly excited by
the RF induced current. While mutual coupling exists due to the interaction between the
adjacent element). The mutual coupling effect has been introduced by the Yagi-Uda
antenna in realizing the beam directional ability. Adopting the Yagi-Uda principle, this
dissertation has proposeda novel five-element patch antenna (single-fed driven element
and four parasitic elements) in achieving the beam steering at ϕ of 0°, 45°, 135°, 225°
and 315°. Two reconfigurable antenna prototypes are implemented with embedded RF
switching technique with two different types of RF PIN diodes, namely; BAR-5002V
and HPND-4005. The first prototype integrates the BAR-5002V on the second substrate
layer known as stacked FPPA. While, the second design integrates the HPND-4005 on
the similar radiating layer denotes as single layer FPPA. The FPPA is developed by a
driven element encircled by four parasitic elements. The driven element is induced by
the coaxial feed technique. Each of the parasitic element is positioned in such a way that
optimum coupling effect is produced from the arrangement of the driven element and
the specified shorting pin locations. Both prototype have achieved an approximate high
gain of 8 dBi at all desired phi directions. Measured and simulated results with a very
good agreement are obtained, thus the proposed concepts considered valid. |
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