• Title/Summary/Keyword: Circular patch

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A New Circular Patch Antenna with Circular Polarization (새로운 형태의 원편파 원형 패치 안테나)

  • 이석곤;이용구;안병철
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2000.11a
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    • pp.364-368
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    • 2000
  • In this paper, we present the design and fabrication of a new circularly polarized circular patch antenna. The antenna is realized using a plastic foam sheet, a Teflon substrate and a metal-coated film. The radiating element is a circular patch proximity-fed by a wide microstrip line. Two thins slots are introduced on the circular patch to obtain a circular polarized radiation. The antenna is optimized using a commercial software. The antenna has 18% impedance bandwidth, 4% axial-ratio band width and 9.12dBi gain.

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Radiation properties of Flush mounted Circular Patch Antenna (접지면과 높이가 같은 원형 패치 안테나의 복사 특성 해석)

  • Song, Jae-Young;Bang, Hyo-Je;Lee, Haeng-Seon
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2005.11a
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    • pp.343-346
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    • 2005
  • Radiation properties of flush mounted circular patch antenna are investigated. The patch is fed axis-symmetrically by a coaxial cable. Rigorous analysis is given using integral transform and mode matching techniques. The presented method accommodates radiating patch, and integrated matching sections and band pass filter.

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Radiation Properties of Flush Mounted Circular Patch Antenna (접지면과 높이가 같은 원형 패치 안테나의 복사 특성 해석)

  • Lee Haeng-Seon
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.2 s.105
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    • pp.193-197
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    • 2006
  • Radiation properties of flush mounted circular patch antennas are investigated. The patch is fed axis-symmetrically by a coaxial cable. Rigorous analysis iscarried out using integral transform and mode matching techniques. The presented method can accommodate a radiating patch, integrated matching section and band pass filter.

The Design of Tx 30GHz/ Rx 20GHz Dual Feeding Circular Polarized Patch Antenna Using LTCC Process (LTCC 공정을 이용한 송신 30GHz/수신 20GHz 이중급전 원형편파 패치 안테나 설계)

  • 김성남;오민석;천영민;최재익;표철식;이종문;천창율
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.53 no.8
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    • pp.448-454
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    • 2004
  • In this paper, circular polarized antennas of Tx 30GHz and Rx 20GHz are implemented in LTCC process. Tx antenna has a circular patch structure and Rx antenna has a ring patch structure. The feeding line of Tx antenna is placed in the center hole of Rx ring patch antenna which is printed under Tx circular patch antenna layer. It makes antenna size smaller. Tx antenna's return loss in under -l0dB level from 30GHz to 31GHz and Rx antenna is under -10 dB from 20GHz to 21GHz. The isolation between two antennas is less than -20dB. Axial ratio is less than 3dB thoughout each band.

The Optimal Design of a Triple-Band Antenna with Additional Arm Resonating Structure for LTE, ISM and WLAN Application (LTE, ISM, WLAN에 적용 가능한 Arm 구조 삼중대역 안테나 최적 설계)

  • Lee, Seung-Je;Oh, Seung-Hun;Lee, Jeong-Hyeok;Kim, Hyeong-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.12
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    • pp.1655-1660
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    • 2014
  • In this paper, we propose a design of a triple-band microstrip circular patch antenna. The proposed antenna generates the triple frequency resonance at 1.85GHz(LTE), 2.45GHz(ISM) and 5.5GHz(WLAN). Firstly, we design the dual-band antenna. The dual-band antenna consist of the circular patch, slits, and the slot. The circular patch and slot are designed for dual frequency of 2.45GHz and 5.5GHz, respectively. And then the dual-band antenna is combined with additional arm-shaped structure for the triple-band characteristic. The arm-shaped structure is operated as the dipole. It is designed for lowest frequency of 1.85GHz. Each part of the antenna unites to a new structure. In order to design the proposed antenna automatically and optimally, APSO algorithm is adopted. During APSO, the mismatch of the proposed antenna is resolved. The optimal designed antenna has an acceptable return loss(-10dB) at each bands(i.e, 1.85GHz, 2.45GHz and 5.5GHz).

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.

A Dual-Band Gap-Filler Antenna Design with a Phi-Shaped Slot

  • Park, Sang Yong;Park, Jong Kweon
    • Journal of electromagnetic engineering and science
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    • v.15 no.2
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    • pp.111-114
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    • 2015
  • In this paper, we have proposed dual-band Phi-shaped slot gap filler antenna for satellite internet service applications. Some properties of the antenna such as return loss, radiation pattern, and gain have been simulated and measured. The proposed antenna has a Phi-shaped slot on the circular patch and is fabricated on the TLX-9 substrate. The radius of the circular patch is 25 mm, and it has a coaxial feeding structure. The dual-band Phi-shaped slot gap filler antenna has high-gain, small-size, simple-structure, and good radiation patterns at each band. The operating frequency band can be tuned by adjusting the length AL and FL of the Phi-shaped slot.

Time Domain Analysis of Circular Patch Antennas (원형 패치 안테나의 시간영역 해석)

  • Lee, Jick-Yeul
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.32A no.10
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    • pp.19-24
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    • 1995
  • The majority of problems to which FDTD is being applied involve open structure which require the appropriate scheme to terminate the computational domain. In particular, for the propagation problem of the outgoing waves, a certain type of boundary condition needs to be applied on outer boundaries of the computational domain to generate no reflected waves. In this paper, a new simple technique is presented, which allows the reduced computation time and excellent absorbing characteristics for normal and oblique incident waves on outer boundaries. To illustrate the validity of this method, a numerical calculation for monopole antenna is carried out and the results are compared to measured data. The time-domain properties for circular patch antennas are investicated.

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Design of Circular Microstrip Patch 2×2 Array Antenna for S-band Applications (S-밴드용 원형 마이크로스트립 패치 2×2 배열 안테나의 설계)

  • Ahn, Yong-Bok;Choi, Byoung-Ha
    • Journal of Advanced Navigation Technology
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    • v.11 no.1
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    • pp.64-71
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    • 2007
  • In this paper, we have designed and fabricated microstrip antenna of S-band for the wireless LAN and the ISM. It array $2{\times}2$ circular patch antenna elements at plane instead of conventional rectangular patch antenna elements. It optimized to size calculated of single patch antenna. The radiation elements distance is array $0.24{\lambda}$. The fabricated circular patch antenna decreased 8% of size compared to the conventional rectangular patch antenna. In the E-plane, designed circular microstrip patch $2{\times}2$ array antenna gain is 12.7[dBi], half power beam width is $40^{\circ}$ and in the H-plane, antenna gain is 12.1[dBi], half power beam width is $45^{\circ}$. Bandwidth is 250[MHz] (VSWR < 2).

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Design of UWB Antenna with Fork-type structure and circular patch (원형 패치와 포크형 구조가 결합된 UWB 안테나)

  • Ha, Yun-Sang;Kim, Gi-Rae;Choi, Young-Kyu;Yun, Joong-Han
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.20 no.10
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    • pp.1837-1844
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    • 2016
  • This paper proposes an antenna of the fork type structure that operates in the UWB (Ultra Wide Band) frequency band (3.1 ~ 10.6 GHz). The proposed antenna is attached a circular patch in order to obtain the UWB band characteristics to the fork-type patch antenna. The ground plane is implemented in a arc-shape configuration. The effect of various parameters of the modified fork type radiating patch and partial arc ground plane for UWB operation is investigated. The proposed antenna is made of $34.0{\times}50.0{\times}1.0mm^3$ and is fabricated on the permittivity 4.4 FR-4 substrate. The experiment results shown that the proposed antenna obtained the -10 dB impedance bandwidth 8200 MHz (2.7 ~ 10.9 GHz) covering the UWB bands. This result satisfied the characteristics of ultra-wideband and the proposed antenna will be applicable to an ultra wideband system.