Improving radiation efficiency using metasurface in pyramidal horn antenna

IET Microwaves, Antennas & Propagation

2019

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A parabolic profile pyramidal horn antenna with flaring in both the E‐ and H‐plane is presented in this study. The proposed structure having aperture dimensions of 518.10 × 408.36 mm2 is designed and fabricated for S‐band (2.2–3.3 GHz). Due to increase in the flaring by 3.35° in the E‐plane and 3.18° in the H‐ plane compared to the optimal typical pyramidal horn antenna (TPHA), a half‐power beamwidth (HPBW) of less than 16.20° in both the planes with higher gain is achieved in the proposed antenna. The maximum phase centre (PC) variation, phase and amplitude variation of the electric field across the aperture in the proposed design are half compared to TPHA throughout the band, thus having good PC stability and lower phase error. The cross‐polarisation level and the measured return loss of <25 and 15 dB, respectively, is achieved throughout the band, thus providing a good impedance matching and single dominant mode of propagation, i.e. TE10. With the lower HPBW and higher gain, the proposed antenna can be used in applications where point directive beam is required such as wireless power transfer to charge sensors and batteries of quad‐copter and so on.

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Section: Simulation and Measurement Resultsmentioning

confidence: 60%

Section: Pc Stabilisation Phase and Amplitude Variation Across The Amentioning

confidence: 99%

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Parabolic profile pyramidal horn antenna with lower phase centre variation and 3 dB beamwidth in S‐band

IET Microwaves, Antennas & Propagation

2019

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“…The side lobe level (SLL) particularly in E‐plane increases at higher frequency as frequency is near to the cut‐off frequency of the second dominant mode (3.48 GHz). The SLL in E‐plane is reduced (doted line in Figure 3(C)) by placing metasurface (MS) inside the APPHA at an optimized distance (in this case 384.55 mm from aperture) which reduces the phase‐error further as shown in TPHA case in 17 …”

Section: Comparison Results and Discussionmentioning

confidence: 95%

“…The SLL in E-plane is reduced (doted line in Figure 3(C)) by placing metasurface (MS) inside the APPHA at an optimized distance (in this case 384.55 mm from aperture) which reduces the phaseerror further as shown in TPHA case in. 17 The gain and jS 11 j are plotted in Figure 3(E),(F), respectively. The maximum gain of 20.7 dBi is achieved at 2.7 GHz and decreases due to the increase in SLL level at the higher frequencies.…”

Section: Comparison Results and Discussionmentioning

confidence: 99%

A high gain aperture match parabolic horn antenna with stable phase center and higher FBR in S‐band

Micro & Optical Tech Letters

2021

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This paper presents an aperture matched parabolic pyramid horn antenna (APPHA) having flaring in the E‐ and H‐ plane. The proposed structure is designed and manufactured for S‐band (2.2–3.3 GHz) with a semicircular aperture matched section in both planes. The APPHA gives half power beam width (HPBW) less than 17° and 15° in the E‐ and H‐ planes, respectively due to the parabolic profile and aperture match section. An average improvement in front to back ratio and gain is 18.53 dB and 1.45 dBi, respectively compared to the conventional pyramidal horn antenna. The maximum variation in the phase center is also 2.8 cm. The measured return loss and cross‐polarization of less than 12 and 20 dB, respectively, is seen throughout the band, thus providing a good impedance matching. The proposed antenna having higher gain and lower HPBW can be used for wireless power transfer applications due to point directive beam to charge the batteries of quad‐copter, sensors as well as being a good candidate for parabolic dish reflector feed.

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Efficient Modeling of DC-RF module of Space Solar Power Satellite with Improved Antenna design and Metasurface

2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)

2019