الفهرس 
Magneto-Electric dipole antennaOnly 14 pages are availabe for public view
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Abstract
This thesis addresses design of antennas and microwave circuits in gap waveguide
Technology. The main advantages of the ridge gap waveguides compared to hollow
waveguides are that they are planar and much cheaper to manufacture, in particular at high
frequencies such as for millimeter and submillimeter waves. The radiation characteristics
of a wideband magneto-electric (ME) antennas are studied. The antenna introduces
wideband impedance matching from 26 GHz to 40 GHz with circular polarization
bandwidth. A wideband ME-antenna is optimized by using substrate integrated waveguide
(SIW) technology for using in printed circuit board (PCB). The single SIW ME-dipole is
designed and a 2 × 2 ME-dipole subarray is constructed to increase the circular polarization
(CP) bandwidth to 80 % and peak gain of 8.3 dBi. Different array configurations have been
investigated.
The radiation characteristics of dielectric resonator antenna (DRA) array using the ridgegap waveguide technology (RGW) for millimeter wave applications at 60 GHz are
investigated. The array element consists of rectangular DRA mounted on ground plane with
coupling slot. The signal is excited through a single rectangular slot in RGW cavity.
Different array arrangements are investigated for gain and bandwidth improvement. Each
array geometry has compact size of 23.04×22.27×5.88 mm3
for 60 GHz applications. 1×3
linear array, two crossed 1×3 arrays, and 3×3 array arrangements are investigated. These
arrangements have a single excitation slot and a number of coupling slots equals to the
DRA elements. A peak gain of 11.3 dBi, 12.9 dBi, and 16 dBi are achieved for different
array arrangements. The proposed structures are full-wave simulated using the finite
integral technique (FIT).