Dual Band U-Slotted Microstrip Patch Antenna for C Band and X Band Radar Applications

Abstract

A compact dual band microstrip patch antenna is designed for C (4-8 GHz) band and X (8-12 GHz) band applications. The proposed antenna consists of a rectangular patch having four U-slots and one I-slot with H-shaped DGS (Defected Ground Structure) . The antenna has overall size of 25mm by 23 mm and gives bandwidth of about 140 MHz from 5.85 GHz to 6 GHz and of about 1.21 GHz from 7.87 to 9 GHz at resonating frequency of 5.9 GHz and 8.8 GHz respectively with DGS. The antenna without DGS mainly resonates at 6 GHz and 8.7 GHz. The antenna with DGS has return losses -16.29dB at 5.9 GHz and -18.28 dB at 8.8 GHz, gain 1.2 dBi for 5.9 GHz and 4.4 dBi for 8.8 GHz. This antenna has been analyzed using IE3D electromagnetic solver.

Design and optimization of triangular microstrip patch antenna using extreme learning machine (ELM)‐based improved Crystal Structure Algorithm (CryStAl) for C‐band application

“…Due to the reflections' production through the disconnections' presence in the transmission line, many signals will lose their power. This is known as return loss, and it is represented as decibels (dB) using Equation (15) to evaluate this power loss.…”

Performance Analysis of a Defected Ground-Structured Antenna Loaded with Stub-Slot for 5G Communication

“…But recent research has shown that the placement of this structure at a sliding displacement from the underneath position of the feed line can also lead to a good parametric output. Some methods are used to reduce cross-polarization [6,7,8], and some others have focused on the improvement of other parameters like gain, bandwidth, and return loss [9,10,11,12,13]. Good isolation between the co- and cross-polarization (XP), as well as reduced XP levels in the H-plane, have been achieved by implementing symmetric and non-proximal DGS shapes in [6], but a slight gain reduction was observed.…”

“…In [10], two different but complimentary DGS structures were implemented which lead to increased bandwidth as well as reduced return loss. In [11,12], rectangular and H slots respectively were used to achieve improved parameters. Both produced enhanced bandwidth and gain in all the three bands, but the efficiency dropped.…”

Wide Ku-Band Microstrip patch antenna using defected patch and ground

“…Merits of Ku-bands are • More targeted coverage • Versatile spectrum with increased reliability • Targets enterprise and government markets Dedicated support with high quality • Avoids signal interference from other communications systems • High bandwidths • New capacity, to supplement saturated C -band • adaptable and secure connectivity • Small antennas for end-users • support large bandwidth applications MSP antenna has various advantages such as, low cost, small size, light weight, thin profile and ease of fabrication [1] but MSP has also few disadvantages like low gain, narrow bandwidth and low efficiency. These disadvantages are overcome by using different methods like: proper feeding [2], array configuration [3], and slots in patch in proper position [4], [5].…”