A circular patch antenna for a switchable circular polarization sense with a slotted ground structure

2009 ◽  
Author(s):  
Won-Sang Yoon ◽  
Dong-Hyo Lee ◽  
Kyoung-Joo Lee ◽  
Sun-Hyung Kim ◽  
Sang-Min Han ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Ground Structure ◽  
Circular Patch ◽  
Circular Patch Antenna

scholarly journals A New Diminutive Octa Polarization Reconfigurable Circular Patch Antenna

2020 ◽  
Vol 9 (6) ◽  
pp. 775-779
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Prototype Model ◽  
Rf Switch ◽  
Left Hand ◽  
Circular Patch ◽  
Compact Size ◽  
Circular Patch Antenna ◽  
Polarization States ◽  
The Right

This proposes a new diminutive octa polarization reconfigurable circular patch antenna design. This new antenna can operate in eight different polarizing states (6 different angles of linear polarization and 2 circular polarization states) with the help of a reconfigurable probe feed network. The antenna comprises of a circular layer of radiation with four equally spaced slits at the boundary of the circular patch to obtain size reduction. The bias voltages of six pairs of PIN diodes are interval between each state. A 3 dB hybrid coupler and a RF switch are used to produce reconfiguration between circular polarization states of the right and left hand. The proposed antenna was designed using CST microwave studio, fabricated as a prototype model and tested which produces desired values for various parameters of antenna including compact size. The designed antenna operates within 2.4-2.5 GHz frequencies suitable for wireless applications

scholarly journals Dual- Band Antenna for Wi-Fi and 5G Applications

2019 ◽  
Vol 9 (1S5) ◽  
pp. 130-131
Keyword(s):  
Circular Polarization ◽  
Linear Polarization ◽  
Patch Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Band Width ◽  
Dual Band ◽  
Circular Patch ◽  
Dual Band Antenna ◽  
Circular Patch Antenna

In this communication, a circular patch antenna is reported for dual- band operation based on VIAs. Initially the patch is resonating at single band with Linear Polarization (LP), and the Circular Polarization (CP) is obtained by inserting semi circular cuts at the edges of circular patch. The second band is achieved by loading the vertical metallic VIAs along the circumference of the patch antenna. The reported antenna is working at 2.4 GHz (Wi-Fi) and 3.5 GHz (5G) bands with Return Loss Band Width (RLBW) of 4.83% and 10.37% respectively. The Axial Ratio (AR) bandwidth at 5G band is 2.38% (3.31- 3.39 GHz)

scholarly journals Circular Polarization of the Square, Circular, Triangle, and Hexagonal Microstrip Antenna

2020 ◽  
Vol 3 (1) ◽  
pp. 5
Author(s):  
Nurhayati Nurhayati ◽  
Paulen Aulia Lutfia ◽  
Raimundo Eider Figueredo Sobrinho ◽  
Alexandre Manicoba De Oliveira ◽  
João Francisco Justo Filho ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Circular Polarization ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Patch Shape ◽  
Circular Patch ◽  
Hexagonal Shape ◽  
Circular Patch Antenna

Microstrip antenna with circular polarization can be applied for many applications. Some microstrip antenna with square, circular, triangular, and hexagonal shape has been designed to get return loss, axial ratio, and radiation performance. We compare twelve microstrip antenna by maintaining its substrate dimension, feeding shape, and outer patch dimension. Even though antenna has a circular patch, it doesn’t always produce circular polarization. From the simulation, we found that with add some structure, the antenna can reach multiband resonance from 1 to 6 GHz. The Circular patch antenna reached seven numbers of the multiband resonance frequency. The hexagonal patch antenna reaches the highest directivity as 9.53 dBi. The circular polarization is achieved for a square and Hexagonal patch shape with axial ratio value is 1.96 dB at 4 GHz and  1.26 dB at 4.1 GHz sequentially at phi 900 and theta 900. 

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 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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