Gain enhancement over a wideband in CPW-fed compact circular patch antenna

2013 ◽  
Vol 6 (5) ◽  
pp. 497-503 ◽  
Author(s):  
Kirti Vyas ◽  
Garima Sanyal ◽  
Arun Kumar Sharma ◽  
Pramod Kumar Singhal
Keyword(s):  
Patch Antenna ◽  
Coplanar Waveguide ◽  
Impedance Bandwidth ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Radiation Characteristics ◽  
Circular Patch ◽  
Gain Enhancement ◽  
X Band ◽  
Circular Patch Antenna

The present paper reports the gain enhancement over a wideband (12–15 GHz) in a coplanar waveguide (CPW)-fed circular patch antenna with circular defected ground structure (DGS). Two compact coplanar circular antennas have been designed and fabricated with and without DGS of same volume 18 × 20 × 1.6 mm3, built over FR4-epoxy substrate (εr = 4.4). Gain enhancement has been achieved by optimizing the current distribution with suitable DGS. For this purpose, structural designs have been optimized by parametric simulations in HFSS and CST MWS. Both the antennas can perform well in variety of wireless communication including WLAN IEEE 802.11 g/a (5.15–5.35 GHz and 5.725–5.825 GHz) and X-band applications including short range, tracking, missile guidance, and radar communication that ranges roughly from 8.29 to 11.4 GHz. The measured experimental results show that impedance bandwidth (S11 < −10 dB) of antenna with DGS is 100%. The antenna with DGS offers gain improvement by 2.7 dB for 13 GHz and 7 dB for 14 GHz. The performance of antenna with DGS is compared to conventional CPW-fed circular patch antenna (without DGS) in terms of reflection coefficient, radiation characteristics, and gain.

scholarly journals Dual Band Slotted Printed Circular Patch Antenna With Superstrate and EBG Structure for 5G Applications

2019 ◽  
Vol 38 (1) ◽  
pp. 227-238 ◽  
Author(s):  
Bismah Hasan ◽  
Kamran Raza
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Radiation Characteristics ◽  
Circular Patch ◽  
Feed Line ◽  
Circular Patch Antenna ◽  
Power Radiation

Slotted circular printed layered patch antenna is designed, simulated and fabricated for 5G (Fifth Generation) wireless communication applications. The antenna consists of slots in the main radiating circular patch element for miniaturizing the size of the radiating element and providing dual band radiation characteristics. The feed line is separated on bottom substrate layer with EBG (Electromagnetic Band-Gap) embedded for enhancing the gain characteristics of the antenna. Superstrate layer is also used for improving the gain of the antenna where the distance from the radiating antenna element is optimized for maximizing the impedance bandwidth and radiation characteristics. The feed realization and impedance matching of the radiating slotted circular patch antenna is done by inducing slot at the middle ground plane of the slot embedded circular patch antenna system. The proposed configuration provides power radiation gain values of more than 5 dB for the Ka band of communications, whereas the impedance bandwidth of the antenna is verified for the dual resonances at 27.5 and 28.5 GHz. Dual band radiation characteristics are attained by embedding and optimizing the slot length and width in the circular patch radiator element that is placed on the upper face of the substrate RT Rogers Duroid 5880 layer. The length of the microstrip feed line embedded in the lower layer of the substrate is optimized for providing required bandwidth characteristics for the dual frequency point radiations. The antenna configuration is designed, modeled and simulated in CST (Central Standard Time) Microwave studio. The antenna is fabricated and measured vs simulated frequency response, gain patterns and current density plots are presented for the verification of antenna operation in the desired frequency bands.

scholarly journals DGS Loaded Broadband Circular Patch Antenna for Satellite Communications

2021 ◽  
pp. 485-491
Author(s):  
Nelapati Ananda Rao ◽  
◽  
V. V. Satyanarayana Tallapragada ◽  
D. Venkat Reddy ◽  
K. L. Narasihimha Prasad
Keyword(s):  
Patch Antenna ◽  
Satellite Communications ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
Circular Patch ◽  
Radiating Element ◽  
Circular Patch Antenna ◽  
Multiple Frequencies ◽  
Good Agreement ◽  
Ku Band

Broadband slotted circular patch antenna with Defective Ground Structure intended for Ku band satellite communications is presented in this communication. The proposed antenna has a fundamental circular radiating element in which a square ring slot is etched along with a circular slot inside it. The ground is etched with a rhombus ring slot at the center and square slots in the corners. The defective ground provides multiple frequencies of operation and the slots in the radiating element act as filters combining the multiple frequencies of operation into broadband. The antenna is fabricated on an FR4 substrate with a volume of 40mm×48mm×1.59mm and a dielectric constant of 4.4. The antenna has been excited using a stripline feed of 50Ω impedance. The proposed antenna has an impedance bandwidth of 1.87GHz ranging from 13.61GHz to 15.48GHz with gain and directivity of 2.2dB and 6.09dB at 13.84GHz, 2.8dB and 5.47dB at 14.48GHz, respectively. The simulated and measured antenna results are in good agreement, showing that the proposed techniques enhance the antenna bandwidth.

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