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Electronic Theses and Dissertations, 2004-2019
Title
A dual circularly polarized (CP) omnidirectional antenna based on slot array in coaxial cylinder structure is presented in this paper. VIRTUAL-WALL SLOT CIRCULARLY POLARIZED PLANAR ARRAY ANTENNA: 1971-08-10: Paine: 343/771: 3518689: FREQUENCY-SENSITIVE CROSS-SCANNING ANTENNA: 1970-06-30: Algeo et al. 343/778: 3281851: Dual mode slot antenna: 1966-10-25: Goebels: 343/771. Dual antennas - (left) the slot antenna, (right) the dipole antenna. Note that a voltage source is applied across the short end of the slot antenna. This induces an E-field distribution within the slot, and currents that travel around the slot perimeter, both contributed to radiation. The dual antenna is similar to a dipole antenna. A dual-polarized tapered slot antenna (TSA) is designed for covering 0.65-9 GHz. Simulated and measured results of optimized single TSA are shown, and two TSAs are crossed for dual-polarization antenna. To make isolation between two TSAs less than -25 dB and to obtain the same gain for each TSA, the configuration is optimized.
Author
Keywords
Wideband, Dual-Polarized, Differential, SIW, Cavity Backed, Slot, Antenna, Double-Resonant, Circular Polarization, Array
Abstract
A new technique for designing wideband dual-polarized cavity-backed slot antennas is presented. The structure is in the form of a double-resonant, dual-polarized slot antenna backed by a shallow substrate integrated cavity with a depth of approximately one tenth the free space wavelength. The presence of the cavity behind the slot enhances the antenna's directivity and reduces the possibility of surface wave propagation in the antenna substrate when the element is used in an array environment. Moreover, the dual-polarized nature of this radiating element may be exploited to synthesize any desired polarization (vertical, horizontal, RHCP, or LHCP). The double-resonant behavior observed in this substrate-integrated cavity-backed slot antenna (SICBSA) is utilized to enhance its bandwidth compared to a typical cavity-backed slot antenna. A prototype of the proposed antenna is fabricated and tested. Measurement results indicate that a bandwidth of 19%, an average gain of 5.3 dB, and a wideband differential isolation of 30 dB can be achieved using this technique. The principles of operation along with the measurement results of the fabricated prototype are presented and discussed in this dissertation. The SICBSA is investigated as a candidate for use as an array element. A uniform two element phased array is demonstrated to locate the main beam from boresight to thirty degrees. The potential effects of mutual coupling and surface wave propagation are considered and analyzed.
Notes
If this is your thesis or dissertation, and want to learn how to access it or for more information about readership statistics, contact us at STARS@ucf.edu
Graduation Date
2010
Advisor
Wahid, Parveen
Dual Polarized Slot Antenna Signal Booster
Degree
- < Previous
- Next >
Electronic Theses and Dissertations, 2004-2019
Title
A dual circularly polarized (CP) omnidirectional antenna based on slot array in coaxial cylinder structure is presented in this paper. VIRTUAL-WALL SLOT CIRCULARLY POLARIZED PLANAR ARRAY ANTENNA: 1971-08-10: Paine: 343/771: 3518689: FREQUENCY-SENSITIVE CROSS-SCANNING ANTENNA: 1970-06-30: Algeo et al. 343/778: 3281851: Dual mode slot antenna: 1966-10-25: Goebels: 343/771. Dual antennas - (left) the slot antenna, (right) the dipole antenna. Note that a voltage source is applied across the short end of the slot antenna. This induces an E-field distribution within the slot, and currents that travel around the slot perimeter, both contributed to radiation. The dual antenna is similar to a dipole antenna. A dual-polarized tapered slot antenna (TSA) is designed for covering 0.65-9 GHz. Simulated and measured results of optimized single TSA are shown, and two TSAs are crossed for dual-polarization antenna. To make isolation between two TSAs less than -25 dB and to obtain the same gain for each TSA, the configuration is optimized.
Author
Keywords
Wideband, Dual-Polarized, Differential, SIW, Cavity Backed, Slot, Antenna, Double-Resonant, Circular Polarization, Array
Abstract
A new technique for designing wideband dual-polarized cavity-backed slot antennas is presented. The structure is in the form of a double-resonant, dual-polarized slot antenna backed by a shallow substrate integrated cavity with a depth of approximately one tenth the free space wavelength. The presence of the cavity behind the slot enhances the antenna's directivity and reduces the possibility of surface wave propagation in the antenna substrate when the element is used in an array environment. Moreover, the dual-polarized nature of this radiating element may be exploited to synthesize any desired polarization (vertical, horizontal, RHCP, or LHCP). The double-resonant behavior observed in this substrate-integrated cavity-backed slot antenna (SICBSA) is utilized to enhance its bandwidth compared to a typical cavity-backed slot antenna. A prototype of the proposed antenna is fabricated and tested. Measurement results indicate that a bandwidth of 19%, an average gain of 5.3 dB, and a wideband differential isolation of 30 dB can be achieved using this technique. The principles of operation along with the measurement results of the fabricated prototype are presented and discussed in this dissertation. The SICBSA is investigated as a candidate for use as an array element. A uniform two element phased array is demonstrated to locate the main beam from boresight to thirty degrees. The potential effects of mutual coupling and surface wave propagation are considered and analyzed.
Notes
If this is your thesis or dissertation, and want to learn how to access it or for more information about readership statistics, contact us at STARS@ucf.edu
Graduation Date
2010
Advisor
Wahid, Parveen
Dual Polarized Slot Antenna Signal Booster
Degree
Doctor of Philosophy (Ph.D.)
College
College of Engineering and Computer Science Gabriel walls poker.
Department
Electrical Engineering and Computer Science
Degree Program
Electrical Engineering
Format
application/pdf
Identifier
CFE0003066
URL
http://purl.fcla.edu/fcla/etd/CFE0003066
Language
English
Release Date
May 2010
Length of Campus-only Access
None
Access Status
Doctoral Dissertation (Open Access)
STARS Citation
Paryani, Rajesh, 'Design Of A Wideband Dual-polarized Cavity Backed Slot Antenna' (2010). Electronic Theses and Dissertations, 2004-2019. 4226.
https://stars.library.ucf.edu/etd/4226