A wideband patch antenna with a pair of antisymmetric balun as differentially fed network

Abstract

A novel singly differentially‐fed microstrip patch antenna (DFMA) is proposed, which is composed of a radiating patch, a differentially‐fed network with a twin antisymmetric miniaturized baluns and a ground plane for unidirectional radiation. In the differentially‐fed network, the signal is coupled to the two feedlines on both sides by the two miniaturized baluns. The radiating patch is excited by the coupling feed sheet located below the radiating patch, and the coupling feed sheet is connected to the upper end of the feedline. The lower end of the feedlines is connected to the ground plane, and there is a slot on the ground of the feeding network. Due to the existence of coupling feed sheet and slot, a second nonradiating resonant is achieved, and a wideband property is obtained. Finally, the prototype of the antenna is fabricated and studied experimentally. Simulated and measured results show that the impedance bandwidth of the antenna is 30.3% (1.71‐2.32 GHz) for S11 < −10 dB. Besides, a stable symmetric radiation pattern is obtained with gain around 9.6 dB and cross‐polarization less than −21 dB, which demonstrates the designed antenna has the property of wideband, high gain and low cross polarization.

Compact Broadband Microstrip Triangular Antennas Fed By Folded Triangular Patch for Wireless Applications

“…However, it affects the performance of the antenna and may slightly deteriorate the radiation patterns for each polarization. Various techniques in previous works have been developed to improve the impedance bandwidth of microstrip antennas [9]- [19]. For this purpose, utilizing the impedance matching networks [9], [10] and inserting the slots into the patch are taken into consideration as two common methods [11]- [13].…”

“…Various techniques in previous works have been developed to improve the impedance bandwidth of microstrip antennas [9]- [19]. For this purpose, utilizing the impedance matching networks [9], [10] and inserting the slots into the patch are taken into consideration as two common methods [11]- [13]. Various shapes of slots on the patch such as U-shaped-slot patches [14], [15], E-shaped patches [16], [17] and V-shaped patch [18], [41] provide a wide bandwidth up to 33%.…”

Bandwidth and gain improvement for reduced size of stacked microstrip antenna fed by folded triangular patch with half V‐shaped slot

“…Various techniques in previous works have been developed in order to improve the impedance bandwidth of microstrip antennas. [9][10][11][12][13][14][15][16][17][18][19] For this purpose, utilizing the impedance matching networks 9,10 and inserting the slots into the patch are taken into consideration as two common methods. [11][12][13] Various shapes of slots on the patch, such as U-shapedslot patches, 14,15 E-shaped patches, 16,17 and V-shaped patch, 18,41 provide the wide bandwidth up to 33%.…”