Compact broadband circularly polarized slot‐patch antenna array. Issue 1 (10th October 2018)

• Record Type: Journal Article
• Authors: Le, Tuan Tu; Tran, Huy Hung; Nguyen, Truong Khang
• Other Names: Palandoken Merih guestEditor.; Nasimuddin N. guestEditor.
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 29:Issue 1(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-10
• Subjects: broadband antenna -- circular polarization -- sequential‐phase feeding network -- slot antenna; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21468
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: A simple design of circularly polarized slot‐patch antenna array with broadband operation and compact size is presented in this article. The antenna element consists of a circular slot and a semicircular patch, which are etched on both sides of a substrate. For the gain and axial ratio (AR) bandwidth enhancement, its array antennas are implemented in a 2 × 2 arrangement and fed by a sequential‐phase feeding network. The final 2 × 2 antenna array prototype with compact lateral dimension of 0.8 λ L × 0.8 λ L ( λ L is the lowest frequency within AR bandwidth) yielded a measured impedance bandwidth of 103.83% (2.76‐8.72 GHz) and a measured AR bandwidth of 94.62% (2.45‐6.85 GHz). The peak gain values within the AR bandwidth are from 2.85 to 8.71 dBi. A good agreement between the simulated and measured results is achieved. This antenna array is suitable for multiservice wireless systems covering WiMAX, WLAN and C‐band applications such as satellite communications.