Effect of Ground Plane for Enhancing the Bandwidth and Virtual Size Reduction of Modified Rectangular Microstrip Antenna

Abstract

This paper presents the design of a simple rectangular microstrip antenna (RMSA) for wide bandwidth and large virtual size reduction. The conventional RMSA has been modified by using only microstripline feed with reduced substrate area. The modified RMSA gives 3.71% of bandwidth and resonates at 4.59 GHz. This bandwidth has been enhanced to 90.70% with a virtual size reduction of 33.33% by using a ground plane 64.50% smaller than the ground plane used in the modified RMSA. If the ground plane is reduced to 74.50% the antenna gives a highest virtual size reduction of 50%. The enhancement of bandwidth and virtual size reduction are achieved without altering the size of the rectangular patch and nature of broadband radiation characteristics. The proposed antennas are simple in their design and they may find application in WLAN.

Microstrip antenna design with partial ground at frequencies above 20 GHz for 5G telecommunication systems

“…Thus, the partial ground plane is implemented through optimization that resulting in the final dimension of Lf x Ws, where the length is similar to the length of feeding line, while the width is equal to the width of the substrate. This grounding technique produces the best reflection coefficient result as the radiating element of the antenna is fully radiating [24]. The designs and optimization are conducted through the use of full electromagnetic wave simulator, Computer Simulation Technology (CST) Microwave Studio.…”

Meander‐line‐based defected ground microstrip antenna slotted with split‐ring resonator for terahertz range

“…High reflection or high efficiency can be achieved in the design based on SRRs by adjusting the geometrical parameters of the structures. The microstrip patch antenna possesses several advantages over conventional bulky antenna such as lightweight, small size, low cost to fabricate, easily integrated with circuits having some applications towards radio altimeters, satellite communication, missiles, remote sensing, biomedical radiators, etc . However, these antennas suffer from narrow bandwidth, low gain, and high value of ohmic losses in the feed of antenna, etc …”

“…To reduce the ohmic loss and enhance gain, the SRR‐based slots have been incorporated within the patch which behaves as a simple RLC resonator with some constructive and destructive couplings (RLC resonator is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel) . The property of a metallic SRR depends on the plasma resonance frequency of the metal .…”

“…The structure offers very good impedance matching at 5.95 THz with a return loss of 37 dB while the maximum realized gain of 7.54 dBi has been obtained at 4.24 THz. The power of this terahertz antenna is fed through the feed line in the optical range having an impedance of 50.06 Ω so that it is convenient to feed by SMA connector of 50 Ω impedance . The resonant frequency and other characteristics mainly depend upon the horizontal and vertical length of the meander line along with the separation between the twist arms, wire width, and the total physical length of the antenna .…”