scholarly journals Series-Fed Microstrip Array Antenna with Circular Polarization

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Tuan-Yung Han
Keyword(s):  
Circular Polarization ◽  
Simulated Data ◽  
Axial Ratio ◽  
Array Element ◽  
Array Antenna ◽  
Antenna Design ◽  
Circularly Polarized ◽  
Feed Network ◽  
Microstrip Array ◽  
Microstrip Array Antenna

This study proposes a novel 2 × 2 array antenna design with broadband and circularly-polarized (CP) operation. The proposed design uses a simple series-fed network to increase the CP bandwidth without requiring one-by-one adjustment of each array element or a complex feed network. Selecting the appropriate spacing between each array element allows the proposed array antenna to generate CP radiation with a low axial ratio. Experimental results based on a prototype show that this 2 × 2 microstrip array antenna achieves a wide 3 dB axial ratio bandwidth of more than 10%. Simulated data are also provided to confirm the measured results.

scholarly journals Dual Orthogonal Feed Circular Polarization Array Antenna Using Microstrip Slot Feed Network

2015 ◽  
Vol 5 (5) ◽  
pp. 1119
Author(s):  
Quazi Delwar Hossain ◽  
Muhammad Asad Rahman ◽  
Md.Azad Hossain
Keyword(s):  
Circular Polarization ◽  
Phase Difference ◽  
Parametric Analysis ◽  
Array Antenna ◽  
Polar Component ◽  
Circularly Polarized ◽  
Microstrip Lines ◽  
Quarter Wavelength ◽  
Feed Network ◽  
Microstrip Array Antenna

<p>This paper presents a new circularly polarized microstrip array antenna using dual-orthogonal feed technique. The feed network for 1x2 array is designed using microstrip lines and slot lines by applying double-sided MIC concept effectively. 90 degree phase difference between two orthogonally feed signals os created by choosing appropriate feed point in the feed network to advance one of the feed signals by quarter wavelength (lemda/4) from other. Excellent radiation performance is obtained from this proposed antenna with low cross polar component. The impedence (&lt;-10dB) bandwidth of the array is 9.1% and the 3-dB axial ration bandwidth is 1.85% (9.905GHz to 10.09 GHz). The average  gain is higher than 9dBiC over the 3-dB AR bandwidth. The relation between antenna dimensions and characteristics ia also investigated with a parametric analysis of the antenna.</p>

A multi-layer approach of orthogonally fed circularly polarized microstrip array antenna for enhanced gain

2019 ◽  
Vol 11 (5-6) ◽  
pp. 532-542 ◽  
Author(s):  
Muhammad Asad Rahman ◽  
Eisuke Nishiyama ◽  
Md. Azad Hossain ◽  
Quazi Delware Hossain ◽  
Ichihiko Toyoda
Keyword(s):  
Integrated Circuit ◽  
Layer Structure ◽  
Single Layer ◽  
Array Antenna ◽  
Compact Structure ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Feed Network ◽  
Microstrip Array ◽  
Microstrip Array Antenna

AbstractA new circularly polarized microstrip array antenna using the orthogonal feed technique is proposed in this paper. The antenna has a multi-layer structure and a new 3-way power divider employing the both-sided microwave integrated circuit technology is designed to configure the feed network of the array. Circular polarization (CP) is realized by creating a quadrature phase difference between orthogonal feed circuits of the patches. The multi-layer structure gives flexibility to adjust the patch spacing that helps to reduce the sidelobe level of the antenna. It is found that the multi-layer structure exhibits a gain of about 2 dB higher than that of a single layer structure by means of sidelobe reduction. The proposed structure also exhibits good CP performances that are verified by a good agreement of measured and simulated results. Simple and compact structure makes the antenna suitable for various wireless applications.

Compact circularly-polarized microstrip array antenna

2010 ◽  
Author(s):  
Ahmed H. Abdelrahman ◽  
Fatma Elhefnawi ◽  
Atef Z. Elsherbeni ◽  
Moataza Hendi ◽  
Salwa Elramly
Keyword(s):  
Array Antenna ◽  
Circularly Polarized ◽  
Microstrip Array ◽  
Microstrip Array Antenna

Spurious radiation suppression in microstrip monopulse antenna

2020 ◽  
Vol 39 (4) ◽  
pp. 791-799
Author(s):  
Rasime Uyguroğlu ◽  
Allaeldien Mohamed Hnesh ◽  
Muhammad Sohail ◽  
Abdullah Y. Oztoprak
Keyword(s):  
Array Antenna ◽  
Slot Antennas ◽  
Conducting Plane ◽  
Content Type ◽  
Rectangular Slot ◽  
Substrate Layer ◽  
Feed Network ◽  
Microstrip Array ◽  
Spurious Radiation ◽  
Microstrip Array Antenna

Purpose This paper aims to introduce a new novel microstrip monopulse comparator system to reduce the spurious radiation from the comparator and the feed network for achieving better radiation performance. Design/methodology/approach Two substrate layers have been used for the microstrip monopulse comparator system. The feed network and the comparator circuits are on the first substrate layer and the microstrip array antenna is on the second layer. The elements of the array antenna are novel square four-sided narrow rectangular slot antennas built on a conducting plane. A commercially available computational software, CST microwave studio, has been used for the analysis of the system. Findings Two substrate layers have been used for the microstrip monopulse comparator system. The feed network and the comparator circuits are on the first substrate layer and the microstrip array antenna is on the second layer. The elements of the array antenna are novel square four-sided narrow rectangular slot antennas built on a conducting plane. A commercially available computational software, CST microwave studio, has been used for the analysis of the system. Practical implications The system is proposed for tracking moving targets. Originality/value Novel slot radiators are introduced as radiating elements in this paper. The antenna arrangement shields the comparator and the feed network circuits, reducing the spurious radiation significantly.

scholarly journals Miniature drone antenna design for the detection of airliners

2020 ◽  
pp. 1-7
Author(s):  
Alassane Sidibe ◽  
Gaël Loubet ◽  
Alexandru Takacs ◽  
Guillaume Ferré ◽  
Anthony Ghiotto
Keyword(s):  
Circular Polarization ◽  
Phase Difference ◽  
Software Radio ◽  
Axial Ratio ◽  
Antenna Design ◽  
Feed Network ◽  
Universal Software Radio Peripheral ◽  
Miniature Antenna

Abstract In this paper, the design of a miniature antenna dedicated to the detection of airliners through the demodulation of Automatic Dependence Surveillance-Broadcast system (ADS-B) signals is presented. This antenna is designed for being embedded on the top of a drone in order to detect and avoid collisions with airliners. This antenna consists of an array of Planar Inverted-F Antennas, a quadrature feed network (FN) and a reflector plane (RP). The FN is designed to have output signals with the same amplitude and a 90° phase difference between each other. It achieves circular polarization and maintains the axial ratio of the antenna under −3 dB at the desired frequency (1.09 GHz). The antenna with the FN was manufactured and characterized. It weighs approximately 145 kg with its RP. The measured gain of the proposed antenna is about +3.7 dBi. To validate the design, the manufactured antenna was tested with a Universal Software Radio Peripheral for the processing of ADS-B signals at the French National Microwaves Days 2019 (JNM) student contest. The detection of airliners can reach up to 437 km.

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