BITS Faculty Publications
Permanent URI for this communityhttp://localhost:4000/handle/123456789/1867
Browse
4 results
Search Results
Item Probe feed effect in polygonal patch antennas(IEEE, 2015) Singhal, RahulThe objective of this paper is to present an analysis to the feeding mechanism for a polygonal patch antenna fed by a vertical probe. The full wave electromagnetic simulations are performed to characterize polygonal patch antennas by changing feed points to observe changes in scattering, gain and impedance characteristics. The probe feed effect in polygonal patch antennas is demonstrated using a simulation software CST Microwave Studio® (CST MWS). A planar pentagonal and hexagonal patch antenna is designed and explored for probe feed effects. The gain characteristics of pentagonal patch is observed better when compared to hexagonal patch over a band of 11.4 to 20 GHz.Item Edge perturbation effect in polygonal patch antennas(IEEE, 2015) Singhal, RahulThe effect of edge perturbation in vertex-fed polygonal patch antennas is studied and analyzed. A polygram shape is obtained by perturbing the edge of polygon. Here, edges of a pentagon and a hexagon are perturbed to obtain a pentagram and hexagram respectively. Pentagram and hexagram patch designs are simulated for different angles (θ) formed when midpoint (vm) of edge of polygon moves towards the center of polygon between adjacent vertices to understand the effect of edge perturbation. The characterization of antenna designs to observe the effect of change in patch design on scattering, impedance and gain characteristics of antennas is performed through simulation on CST MWS®. It is observed that wideband characteristics between 12 to 20 GHz of pentagonal and hexagonal patch antennas are retained with pentagram and hexagram geometries till angle θ is greater than 165.63° and 163.15° respectively. For lower values of θ, multiband behavior is observed for polygram patch antenna designs. Analyzing results of all patch geometries reflects that the performance of the pentagonal patch antenna is better in terms of gain compared to others within the operating band.Item Gain Improvement in Polygonal Patch Antennas(IEEE, 2015) Singhal, RahulThe effect of polygonal slot in vertex-fed polygonal patch antennas is studied and analyzed. A polygonal shaped slot is obtained by creating a polygonal slot at the center of polygon. Here, the pentagonal and hexagonal shaped slot is created at the center of a pentagon and a hexagon. Pentagonal and hexagonal shaped slotted patch designs are simulated for different radius of slot (R2) formed when vertices of polygonal slot moves from center towards the vertices of polygon to understand the effect of polygonal slot. The characterization of antenna designs to observe the effect of slot in patch design on scattering, impedance and gain characteristics of antennas is performed through simulation on CST MWS ® . It is observed that wideband characteristics between 12 to 28 GHz of pentagonal and hexagonal patch antennas are retained with pentagonal and hexagonal shaped slot geometries till radius is equal to 15 mm and 16 mm respectively. For lower values of R2, multiband behavior is observed for polygonal shaped slotted patch antenna designs. Analyzing gain results of all slotted patch geometries reflects that the performance of the hexagonal patch antenna is better in terms of gain compared to others within the operating band.Item Probe-fed regular hexagonal narrow-slot antenna with reduced ground plane for WLAN applications(IEEE, 2016) Singhal, RahulThe effect of hexagonal slot in probe-fed hexagonal shaped patch antenna with reduced ground plane is proposed, analyzed and studied. In this paper, experimental and simulation results for a probe-fed proposed antenna required for impedance characterization are presented and compared. The hexagonal slot in hexagonal antenna improves the gain of the antenna compared to antenna without slot. With a thickness of 0.027 times the free space wavelength (λ 0 ), the hexagonal shaped patch antenna with hexagonal slot and reduced ground plane can achieve a bandwidth of around 400 MHz in C-band centered at 5.5 GHz. The fabricated hexagonal shaped patch antenna with hexagonal slot can be utilized for requirements of WLAN applications.