A circularly polarized antenna array with sequential-phase feed network

2021 ◽  
pp. 1-13
Author(s):  
Qian-Qian Li ◽  
Hao Pan ◽  
Zhen-Hua Zhao ◽  
Hai-Feng Zhang
Keyword(s):  
Antenna Array ◽  
Circularly Polarized ◽  
Feed Network ◽  
Sequential Phase

Wideband and high-gain circularly-polarized L-shaped slot antenna array using metamaterial

2020 ◽  
pp. 1-6
Author(s):  
Qiang Chen ◽  
Guolin Zhang ◽  
Changhui He ◽  
Ya Fan ◽  
Zhenbo Zhu ◽  
...  
Keyword(s):  
Antenna Array ◽  
High Frequency ◽  
High Gain ◽  
Slot Antenna ◽  
Radiation Model ◽  
Circularly Polarized ◽  
Feed Network ◽  
Sequential Phase ◽  
Frequency Area ◽  
Size And Structure

Abstract This research involves a compact wideband circularly-polarized antenna array, which consists of a sequential rotating phase feed network, 2 × 2 mushroom-type metamaterial (MTM) unit, and so on. Each antenna array unit contains a microstrip feedline, an L-shaped slot antenna, and so on. The MTM-based antennas were incorporated with a sequential-phase network of sequentially rotated series-parallel feed to achieve wideband operation. The operational bandwidth and the radiation model in the high-frequency area were improved through the adjustment of spacing between the L-shaped slots while maintaining the size and structure of the MTM. The proposed design had dimensions of 80 mm × 80 mm × 3.5 mm (~1.64 λ0 × 1.64 λ0 × 0.072 λ0 at 6.15 GHz), and it was simulated, fabricated, and tested.

Dual circularly polarized multilayer MIMO antenna array with an enhanced SR-feeding network for C-band application

2017 ◽  
Vol 9 (8) ◽  
pp. 1741-1748 ◽  
Author(s):  
Mahdi Jalali ◽  
Mohammad Naser-Moghadasi ◽  
Ramezan Ali Sadeghzadeh
Keyword(s):  
Antenna Array ◽  
Tai Chi ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Circularly Polarized ◽  
Mimo Antenna ◽  
Feed Network

Wide-band circularly polarized multi-input multi-output (MIMO) antenna array with a 2 × 4 feed network was proposed for C-band application. Different unique techniques were utilized in the proposed array to enhance the antenna characteristics, such as gain, 3 dB axial ratio bandwidth (ARBW), impedance tuning, and ruinous mutual coupling effects. A miniaturized dual-feed Tai chi-shaped antenna element with a pair of feeding points and a pair of eyebrow-shaped strips was presented for enhancing circular polarization (CP) purity and impedance matching. For a better improvement of CP features, a 2*4 MIMO sequentially rotated (MIMO-SR) feed network was used to achieve broader 3 dB ARBW. Besides, the MIMO feature of the feed network could control the left- and right-handed CP, respectively. Ultimately, specific forms of slot and slit structures were applied onto the top layer of MIMO feed network that provided a high isolation between the radiating elements and array network. Furthermore, the diversity gain (DG) was studied. The extracted measured results illustrated an impedance bandwidth of 3.5–8.2 GHz at port 1 and 3.5–8.3 GHz at port 2 for VWSR < 2 and 3 dB ARBW of 4.6–7.6 GHz at port 1 and 4.6–7.5 GHz at port 2. The peak gain of 9.9 dBi was at 6 GHz.

Bandwidth- and Gain-Enhanced Circularly Polarized Antenna Array Using Sequential Phase Feed

2014 ◽  
Vol 13 ◽  
pp. 1215-1218 ◽  
Author(s):  
Wenwen Yang ◽  
Jianyi Zhou ◽  
Zhiqiang Yu ◽  
Linsheng Li
Keyword(s):  
Antenna Array ◽  
Circularly Polarized ◽  
Sequential Phase

scholarly journals A Single Feed Circularly Polarized Planar Antenna Array

2019 ◽  
Vol 9 (2) ◽  
pp. 657-661
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Communication Systems ◽  
Planar Antenna ◽  
Circularly Polarized ◽  
Quarter Wave ◽  
Feed Network ◽  
Polarization Characteristics ◽  
Structural Simplicity ◽  
Planar Antenna Array

A design of a circularly polarized planar antenna array of elliptical patches is presented. The designed prototype has been verified experimentally. Elliptical patches produce circular polarization by using a single feed only. A corporate feed network with quarter-wave transformers are used for uniform excitation of all the array elements. Primary advantages of the presented antenna array are structural simplicity, good circular polarization characteristics and no side lobes. Here, the design example is given for 2×2 elliptical patches at 2.8 GHz. Similar procedure can be extended for more number of array elements at the desired frequency of operation to cater the need of communication systems where circular polarization is essential.

Circular polarization realization in array antennas by a modified sequential phase feeding mechanism of linearly polarized elements

2019 ◽  
Vol 11 (7) ◽  
pp. 729-738
Author(s):  
A. Haghshenas ◽  
CH. Ghobadi ◽  
J. Nourinia ◽  
M. Majidzadeh ◽  
S. Mohammadi-Asl
Keyword(s):  
Ground Plane ◽  
Slot Antennas ◽  
Circularly Polarized ◽  
Array Antennas ◽  
Four Corners ◽  
Linearly Polarized ◽  
Feed Network ◽  
Array Structures ◽  
And Performance ◽  
Sequential Phase

AbstractNovel designs of a circularly polarized 2 × 2 and 4 × 4 slot array antennas (CPSAAs) are proposed. Sequential phase feed network composed of a section of 270° and four strips is utilized to feed the array structures. Array elements are simple linearly polarized wide slot antennas (WSAs) composed of simple radiating patches with truncation on four corners and slotted ground plane on substrate backside. Each WSA operates over the UWB frequency band of 3.1–10.6 GHz. When the WSAs are arranged in the form of 2 × 2 and 4 × 4 CPSAAs, frequency bands of 3–13.1 and 1.4–12.3 GHz are covered, respectively. More importantly, CP is generated at 4.5–8 and 4.6–8.8 GHz for 2 × 2 and 4 × 4 CPSAAs, respectively. This is while; the WSAs are linearly polarized elements. Higher gain values and wider bandwidths are obtained with respect to single WSA. Design process and performance analysis of the single and array antennas are discussed through the paper.

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