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A novel compact dual‐circularly polarized (CP) 2 × 1 microstrip array antenna with wideband characteristic is proposed. The antenna is realized using multi‐layer technique. The antenna consists of two orthogonally fed patch elements integrated with a 90° branch‐line coupler for achieving dual‐CP operation. The complete feed network, inspired by double‐sided MIC technology, is designed using microstrip...
A new circular polarization microstrip antenna having a defected ground plane is presented in this paper. A defect on the ground plane is introduced by inserting a square ring slot just below one of the top corners of the patch. The inserted slot on the ground creates a perturbation in the patch as like as conventional perturbed circular polarization antennas. The measured 3-dB axial ratio bandwidth...
A new microstrip antenna with frequency and polarization diversity is presented in this paper. A corner truncated square patch separated from the corner segment by a narrow slot is employed to change polarization sense. Frequency diversity is obtained by making the size of the corner segment larger than the truncated corner portion of the patch. A PIN diode is installed between the patch and the corner...
This paper describes a novel microstrip patch antenna with switchable circular polarization. A square patch whose two top corners are truncated by a square portion is used to realize the proposed antenna. Two Schottky diodes connected in the opposite direction are used to correlate the separated corner segments with the patch by their switching operation. As a result, RHCP and LHCP can be alternated...
This paper presents a circularly polarized 1×2 array antenna for X-band applications. Both-sided MIC technology is effectively used to design this array antenna as the array antenna consists of both microstrip lines and slot lines to realize the feed network. Patch elements and microstrip lines are placed on the top surface of the substrate and slot lines on the reverse surface (ground plan) of the...
In this paper, the design of a circularly polarized array antenna with 9.56 dBi of gain at 10 GHz frequency is presented. The proposed antenna consists of a 2×2 array antenna with feed network where all microstrip patches are linearly polarized. “Both-Sided MIC Technology” is used to design the proposed array antenna. The simulated return loss of the proposed array antenna is less than −35dB. The...
Design of a microstrip array antenna to achieve dual circular polarization is proposed in this paper. The proposed antenna is a 2×2 array antenna where each patch element is circularly polarized. The feed network has microstrip lines, cross slot lines and air-bridges. The array antenna can excite both right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) without using...
In this paper, the design of a circularly polarized array antenna at 10 GHz frequency is presented. The proposed antenna consists of a 1×2 array antenna with feed circuit. To realize circular polarization, dual-orthogonal feed circuit is used that excites two orthogonal modes with equal amplitude but quadrature in phase. Feed circuit is designed using microstrip lines and slot lines where microstrip...
This paper presents a new circularly polarized array antenna using linearly polarized microstrip patches with a gain of 7.47 dBi. The array structure consists of four square patch antennas with feed network. The feed network is designed using microstrip lines on the obverse side of the dielectric substrate and slot line on the reverse side of the substrate. The Teflon glass fiber substrate is used...
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