• Title, Summary, Keyword: wideband circular polarization

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Wideband circularly-polarized microstrip $1\times8$ array antenna for TX/RX dual operation at X-band

  • Yun, Jae-Seung;Noh, Haeng-sook;Jeon, Soon-Ik;Park, Jae-Ick
    • Proceedings of the IEEK Conference
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    • pp.715-718
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    • 2002
  • TX/RX dual microstrip 1$\times$8 sub-array antennas are designed, fabricated, and measured for a wideband array antennas in communications. They have a Right Handed Circular Polarization (RHCP) for TX from 7.9 to 8.4 GHz and Left Handed Circular Polarization (LHCP) for RX from 7.25 to 7.75 GHz. Two stacked patches are used for a wideband characteristics and cornertruncated square patches are adopted for a circular polarization. To enhance bandwidth characteristics of a circular polarization, 1$\times$2 sequential rotation arrays are applied. From the measured results, 1$\times$8 microstrip sub-array antennas have a good agreement with those of the simulation. Therefore the sub-array antennas are applicable to satellite communication antennas, active phased array antennas, and radiators in other antennas.

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A Wideband Circularly Polarized Pinwheel-Shaped Planar Monopole Antenna for Wireless Applications

  • Lee, Wang-Sang;Oh, Kyoung-Sub;Yu, Jong-Won
    • Journal of electromagnetic engineering and science
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    • v.12 no.2
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    • pp.155-160
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    • 2012
  • A wideband circularly polarized pinwheel-shaped planar monopole antenna fed by a wideband feeding network is presented in this paper. The proposed antenna is formed by four wideband planar monopole antenna elements with aquadruple feeding network in order to improve the performance of circular polarization. Additionally, the antenna, which is introduced here, has a high gain in the z axis direction because of its folded antenna structure. The attractive characteristics of the proposed antenna are the wide impedance bandwidth of 87.3 % (1 GHz to 2.55 GHz), the 3 dB axial ratio (AR) bandwidth of 92.3 % (1.05 GHz to 2.85 GHz), and the maximum gain within the 3 dB AR bandwidth is about 8.24 dBic.

Asymmetric and symmetric modified bow-tie slotted circular patch antennas for circular polarization

  • Darimireddy, Naresh K.;Reddy, R. Ramana;Prasad, A. Mallikarjuna
    • ETRI Journal
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    • v.40 no.5
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    • pp.561-569
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    • 2018
  • Modern communication systems employ wideband antennas with circular polarization (CP) radiation. In this work, asymmetric modified bow-tie (ABT) and symmetric modified bow-tie (SBT) slotted circularly polarized single-point probe-fed circular patch antennas with dimensions of $40mm{\times}40mm$ for wideband applications are proposed. A 10 dB RL bandwidth of 350 MHz with CP, 3 dB axial ratio (AR) bandwidth of 100 MHz, peak gain of 4.9 dBic, and 10 dB RL bandwidth of 530 MHz with CP, 3 dB AR bandwidth of 140 MHz, peak gain of 5 dBic are obtained for ABT and SBT slotted circular patch antennas, respectively. The proposed SBT slotted patch is scaled up and down to $50mm{\times}50mm$ and $30mm{\times}30mm$, respectively. The proposed scaled-up version offers 10 dB RL and 3 dB AR bandwidths of 340 MHz and 80 MHz, with a peak gain of 5 dBic. The scaled-down version offers 10 dB RL and 3 dB AR bandwidths of 710 MHz and 180 MHz, with a peak gain of 5.25 dBic. These prototypes are suitable to work in IEEE 802.11a WLAN, ISM, and IEEE 802.11ac applications. The measured and simulated results are then discussed and compared.

Satellite Communication Microstrip Antenna for Tx/Rx Dual Operation at X-Band (X 대역 위성통신 송/수신 겸용 마이크로스트립 안테나)

  • Kim, Kun-Woo;Lee, Sung-Jae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.2
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    • pp.164-171
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    • 2014
  • Transmit(Tx)/Receive(Rx) dual band operation microstrip array for X-band satellite communications are designed, fabricated, and measured in this paper. The microstrip array antenna has Right Handed Circular Polarization(RHCP) for Tx band and Left Hand Circular Polarization(LHCP) for Rx band. Two stacked patches are used for wideband characteristics and corner-truncated square patches are adopted for a circular polarization. To enhance bandwidth characteristics of a circular polarization, $2{\times}2$ sequential rotation array are applied. From the measured result, $8{\times}12$ microstrip array antennas have a good agreement with those of the simulation. Therefore the array antennas are applicable to military satellite communication antennas.

A Study on the Design of Wideband Microstrip Cross Slot Array Antennas with Circular Polarization (원편파용 광대역 마이크로스트립 크로스 슬롯 어레이 안테나의 설계에 관한 연구)

  • Min, Kyeoung-sik;Ko, Jee-Won
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.4
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    • pp.894-900
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    • 2004
  • There are many types of circularly polarized(CP) microstrip antenna elements, which are used as a good unit radiator. Since an advantage of CP antenna is no strict alignment requirements between Rx and Tx system, the printed antennas with circular polarization are very often used in numerous satellite and mobile radio systems. In order to realize the broad bandwidth of 3 dB axial ratio and impedance of CP microstrip antenna, complex feed structure and tri-plate patch element have been researched. This paper describes a design of wideband microstrip cross slot array antennas with circular polarization. The proposed antenna is composed of an open-ended microstrip feed line as a feeder and a cross slot as a radiator for circular polarization. To realize the wide bandwidth, tri-plate structure are considered and cross slot is electromagnetically coupled with feed line. Optimum parameters of 1-element cross slot antenna are analyzed and designed by method of moments. These parameters are also applied to may antennas design considered the mutual coupling between radiating elements. Right hand circular polarization(RHCP) and left hand circular polarization(LHCP) of the proposed antenna are easily controlled by asymmetrical cross slot structure and slot position. In 1-element and 15-element cross slot array antenna, the good axial ratio of 1 dB below and the broad bandwidth characteristics of antenna are obtained.

Design of Wideband Circular polarized Patch Antenna for 1.6GHz band (1.6GHz대역용 광대역 원편파 패치 안테나 설계)

  • Kim, GunKyun;Rhee, Seung-Yeop;Yeo, Junho;Lee, Jong-Ig;Kang, NyoungHak
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.61-62
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    • 2017
  • In this study, a circular polarization patch antenna operates at the wide bandwidth of 1.5GHz~1.7GHz was designed. To obtain the wide bandwidth and high gain, the high air substrate was applied. The impedance bandwidth is improved by adjusting the sizes of patch, the distance between main patch and ground plate, the length of internal slots, the position of feeding point, the length of external stub, etc. The antenna is designed by simulation for an operation in the frequency range of 1.5GHz~1.7GHz band, and the antenna characteristics such as return loss, gain, radiation patterns are examined.

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Design of Microstrip array antennas for Tx/Rx dual operation at X-band (X-band 송/수신 겸용 마이크로스트립 배열 안테나 설계)

  • 노행숙;윤재승;전순익
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.27 no.12C
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    • pp.1299-1305
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    • 2002
  • Tx/Rx dual microstrip array antennas for satellite communications are designed, fabricated, and measured in this paper. They have a Right Handed Circular Polarization (RHCP) for Tx and Left Handed Circular Polarization (LHCP) for Rx. Two stacked patches are used for wideband characteristics and corner-truncated square patches are adopted for a circular polarization. To enhance bandwidth characteristics of a circular polarization, 2${\times}$1 sequential rotation mays are applied. From the measured results, 8${\times}$1 microstrip may antennas have a good agreement with those of the simulation. Therefore the array antennas are applicable to satellite communication antennas, active phased may antennas, and radiators in other antennas.

Conformal Horn Antenna for Circular Polarization using Planar-type Radiator (평판형 방사소자를 이용한 원형편파용 혼 안테나 설계)

  • Jung, Young-Bae
    • Journal of IKEEE
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    • v.16 no.3
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    • pp.173-176
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    • 2012
  • This paper introduces a novel horn antenna for circular polarization using a planar-type radiator. This antenna can be divided to two parts, microstrip antenna and square horn. The microstrip antenna has the role of feeder and polarizer of the horn antenna, and it is designed to stacked type having metal spacer for high gain, high isolation and wideband characteristic. Using the proposed antenna structure, the horn antenna needs not additional structure such as feeder and polarizer, and the size of it can be considerably reduced. The horn antenna has typical gain of 8dBi and 3-dB axial-ratio bandwidth around 4.9%.This antenna can widely used for various antenna system for mobile and satellite communication using circular polarization expecially in high frequency band.

Ferrite-based wideband circularly polarized microstrip antenna design

  • Mashhadi, Mostafa;Komjani, Nader;Rejaei, Behzad;Ghalibafan, Javad
    • ETRI Journal
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    • v.41 no.3
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    • pp.289-297
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    • 2019
  • In this paper, a wideband, circularly polarized patch antenna is proposed that leverages the unidirectional resonant modes of a circular patch mounted on top of a grounded dielectric-ferrite substrate. The proposed antenna is fed via the proximity coupling method and several parasitically coupled patches are placed on a dielectric superstrate to enhance the impedance bandwidth of the antenna. The resonant modes of the structure rotate only in the clockwise or counter clockwise directions. In the frequency range where the effective permeability of the ferrite layer is negative, the resonance frequencies of these modes differ significantly, which produces a large axial ratio (AR) bandwidth. For the proposed antenna, the numerical results show the 10 dB impedance bandwidth to be around 44% and the 3 dB axial ratio bandwidth to be higher than 64%.

Design of Circular Patch Antenna for 1.6G Hz band Satellite Navigation System (1.6 GHz대역 위성항법 시스템용 원형 패치 안테나 설계)

  • Kang, NyoungHak;Rhee, Seung-Yeop;Yeo, Junho;Lee, Jong-Ig;Kim, GunKyun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.63-64
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    • 2018
  • In this study, a design method for a circular polarization patch antenna operating at a frequency 1.5 GHz~1.7 GHz was studied. To obtain the wide bandwidth and high gain, air substrate between patch and ground plane was applied. The impedance bandwidth is improved by adjusting the sizes of patch, the distance between main patch and ground plate, the length of internal slots, the position of feeding point, the length of external stub, etc. The antenna is designed and simulated for an operation in the frequency range of 1.5GHz~1.7GHz band. The results show that antenna characteristics such as return loss, gain, axial ratio, radiation patterns are appropriate for the satellite navigation system.

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