A design for suspended patch antenna with switchable polarization

Lin, Yan Ming; Yang, Jhe Sheng; Row, Jeen‐Sheen

doi:10.1002/mop.29801

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…All of the former examples make use of different techniques that include air in the improvement of the performance indexes, whether as a cavity-backed [18] or additional layer, such as in the air-gap technique [13], the suspended patch technique [21], or the inverted patch technique [19]. However, in none of these is the patch really isolated as a completely dielectricless floating element only surrounded by air, which is the new approach used in this novel proposal.…”

Section: Introductionmentioning

confidence: 99%

Design of a Wide-Bandwidth, High-Gain and Easy-to-Manufacture 2.4 GHz Floating Patch Antenna Fed with the Through-Wire Technique

Fernández

Herraiz

et al. 2022

Applied Sciences

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This paper presents a feasibility study for designing a floating patch antenna structure fed with a probe from a microstrip. The main premise is to eliminate the dielectric in the patch design, which is equivalent to having an air dielectric and leads to the necessity of proper support to fasten the patch in the air. The novelty of this paper is that this new device, apart from being fed with the though-wire technique directly from the microstrip line, has to be, by design, robust and easy to manufacture, and, at the same time, it has to present, simultaneously, good values in all of the performance indexes. A prototype has been designed, manufactured, and measured with good performance results: a bandwidth higher than 10% around 2.4 GHz, a radiation efficiency higher than 96%, a 9.63 dBi gain, and a wide beamwidth. The main advantages of this prototype, together with its good performance indexes, include its low fabrication cost, low losses, light weight, robustness, high integration capability, the complete removal of the dielectric material, and the use of a single post for feeding the patch while simultaneously fixing its floating position.

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Section: Introductionmentioning

confidence: 99%

Design of a Wide-Bandwidth, High-Gain and Easy-to-Manufacture 2.4 GHz Floating Patch Antenna Fed with the Through-Wire Technique

Fernández

Herraiz

et al. 2022

Applied Sciences

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show abstract

“…The same design concept has also been applied to a suspended patch antenna embedded with a cross slot. 12 The effective lengths of the two linear slots are controlled with four diodes mounted on the cross slot, and the antenna can be 1 operated in LP, RHCP, and LHCP modes. For these designs mentioned above, the radiating elements have the aperture sizes, excluding the ground plane, of 0.12-0.2 λ 0 2 .…”

Section: Introductionmentioning

confidence: 99%

“…A magneto‐electric dipole antenna with tri‐polarization operation is presented in Reference [11], and four diodes are used to reconfigure the electrical lengths of the two radiating arms of the dipole. The same design concept has also been applied to a suspended patch antenna embedded with a cross slot 12 . The effective lengths of the two linear slots are controlled with four diodes mounted on the cross slot, and the antenna can be operated in LP, RHCP, and LHCP modes.…”

Section: Introductionmentioning

confidence: 99%

A scanning phased array based on a polarization reconfigurable antenna with compact aperture size

Liu

Row

2021

Int J RF Mic Comp-Aid Eng

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A compact antenna with tri-polarization switching is presented. The antenna is mainly composed of a monopole slot and a shorted loop, and the two radiating elements are connected in series and placed in a metallic box filled with dielectrics. To realize polarization switching, four PIN diodes are introduced into the antenna structure, and they cannot only suppress the excitation of the loop antenna but also vary the direction of the current flowing on the loop. Both simulated and measured results indicate that the proposed antenna can be operated in one linear polarization and dual circular polarization modes within an impedance bandwidth of around 15%; moreover, the aperture size of the antenna is about 0.09 λ 0 2 . Based on the polarization reconfigurable antenna, a 1 Â 8 phased array with an aperture size of 0.3 λ 0 Â 2.8 λ 0 is then developed. Simulated results show that the phased array operating in each polarization mode can give a gain fluctuation of smaller than 1.5 dB and a side lobe level of less than À10 dB when the beam is scanned from À60 to 60 .Experiments are also carried out, and their results have good agreements with the simulated data.

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“…The polarization switchable antennas employ electronic switches [6]- [17], switchable polarizer [18], mechanical rotation [19], and optical devices [20]. The electronic switches can redirect antenna currents to switch the antenna's polarization with the advantages of agile tuning, low loss, and flexible control.…”

mentioning

confidence: 99%

A Quad-Polarization and Beam Agile Array Antenna Using Rat-Race Coupler and Switched-Line Phase Shifter

Hasan,

Nishiyama,

Toyoda

2023

IEEE Open J. Antennas Propag.

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This paper proposes a quad-polarized microstrip array antenna with beam steering capability. The proposed antenna consists of two patch elements, one rat-race coupler, and two 90 • switchable phase shifters. With the aid of just four PIN diodes, the two 90 • phase shifters can provide four different diode arrangements for each port of the rat-race coupler. The array elements are excited by using orthogonal feed lines. Due to the combination of the rat-race coupler and phase shifters, different phase conditions are generated between the patch elements or orthogonal modes of the patches. As a result, the proposed antenna can achieve two beams for each of four polarizations, i.e. two circular polarizations (CP) and two linear polarizations (LP). In the case of CP, the antenna can switch the beams between sum and difference radiation patterns. On the other hand, the beam can be tilted to ±15 • and ±12 • for horizontal and vertical LP states, respectively. A prototype of the antenna is manufactured and measured demonstrating results in accordance with simulation expectations. Measured results indicate that the 10-dB impedance covers from 5.6 to 5.9 GHz and the measured gains range from 7 to 8.5 dBic.INDEX TERMS circular and linear polarization, polarization-agile, reconfigurable antenna, switchable feed, pattern reconfigurable, beam-steering antennas I. INTRODUCTION

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A design for suspended patch antenna with switchable polarization

Cited by 5 publications

References 9 publications

Design of a Wide-Bandwidth, High-Gain and Easy-to-Manufacture 2.4 GHz Floating Patch Antenna Fed with the Through-Wire Technique

Design of a Wide-Bandwidth, High-Gain and Easy-to-Manufacture 2.4 GHz Floating Patch Antenna Fed with the Through-Wire Technique

A scanning phased array based on a polarization reconfigurable antenna with compact aperture size

A Quad-Polarization and Beam Agile Array Antenna Using Rat-Race Coupler and Switched-Line Phase Shifter

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