NDLI: Broadband, low-cost and low cross-polarisation dual linearly polarised reflectarray antenna

Content Provider	IET Digital Library
Author	Mahmoodi, Mahboobeh Chamaani, Somayyeh
Abstract	This study attempts to attain a broad bandwidth (BW) from a simple and low cost dual linearly polarised structure. The unit cell is a patch loaded with three concentric slots: a square, a vertical cross and a slant cross, printed on a foam backed dielectric. Required phases can be adjusted by both vertical and slant crosses which provides an extra degree of freedom in phase error and phase sensitivity reduction. The slant cross also improves angular stability of gain and cross-polarisation. Four reflectarrays (RAs) were designed at 10.7 GHz frequency. RA1 and RA2 utilised only the vertical and slant crosses, respectively, whereas RA2 achieved broader BW due to less sensitivity of slant cross. RA3 used both crosses to get lower phase error. However, due to dissimilarity among cells and uncontrolled phase sensitivity, it was poor in terms of gain and BW. To overcome this issue, in RA4, in addition to phase error and phase sensitivity control diversity, a local similarity is enforced. This array shows 23 dB gain and 3 dB gain BW of 17%. In 3 dB BW, its cross-polarisation level is −24 dB at boresight and also satisfactory in non-principal planes.
Starting Page	917
Ending Page	925
Page Count	9
ISSN	17518725
Volume Number	10
e-ISSN	17518733
Issue Number	Issue 9, Jun (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/10/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2015.0517
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2016-06-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Angular Stability Improvement Antenna Array Antenna Radiation Pattern Broad Bandwidth Broadband Antenna Broadband Dual Linearly Polarised Reflectarray Antenna Frequency 10.7 GHz Gain 23 DB Gain 3 DB Low Cross-Polarisation Dual Linearly Polarised Reflectarray Antenna Low-cost Dual Linearly Polarised Reflectarray Antenna Microwave Antenna Array Phase Error Reduction Phase Sensitivity Reduction RA1 RA2 RA3 RA4 Reflect Array Antenna Slant Cross Concentric Slot Square Concentric Slot Vertical Cross Concentric Slot
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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