Enhanced gain and broadband of endfire antenna by using I‐shaped resonator structures. Issue 7 (10th September 2018)

• Record Type: Journal Article
• Authors: Sun, Yuanhua; Du, Zhibo; Du, Jiang; Liu, Yihe; Basit, Muhammad Abdul
• Other Names: Chen Zhi Ning guestEditor.; Xu He‐Xiu guestEditor.; Jiang Zhi Hao guestEditor.
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 28:Issue 7(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-09-10
• Subjects: broadband -- endfire antenna -- high gain -- I‐shaped resonator; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21519
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: A broadband high‐gain periodic endfire antenna is presented in this article. The broadband is achieved by using a planar out‐of‐phase power divider with ultra‐wideband performance and periodic dipole elements. The device uses two substrates with a common ground plane. A coupling between two microstrip lines on the top and bottom substrate layers through a slot in the common ground plane, and a transition from two microstrip lines to a parallel stripline are used to achieve an ultra‐wideband operation. The gain enhancement is achieved by loading with an I‐shape resonator (ISR) structure in the endfire direction. The effect of the I‐shape unit cell structure on the gain enhancement is investigated. Both the ISR‐loaded antenna and unloaded one are fabricated to verify the predictions. The measurements show that ISR‐loaded antenna presents gain of about 7 dB‐10 dB in the whole working band (3 GHz‐11 GHz), which is about 2 dB‐3.5 dB more than the unloaded one. The proposed antenna can be using in wireless communication systems for its advantages of broad bandwidth and high‐gain.