• Title/Summary/Keyword: CPW feeding

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CPW-Fed π-Shaped Antenna for Wideband (CPW급전 광대역 파이형 안테나)

  • Kang, Young-Man;Ceong, Hyi-Thaek;Rhee, Seung-Yeop
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.2
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    • pp.291-298
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    • 2018
  • In this paper, we propose an antenna that improves narrow band characteristics which is a disadvantage of inverted-F type antenna and utilizes the structural advantages of small size and low profile by modifying the inverted-F type antenna structure and applying CPW feeding method. Experimental results show that the broadband characteristic of about 40% at the center frequency of 3 GHz is seen, and it is found that the narrow band characteristic which is a disadvantage of the conventional inverted F antenna can be improved. The radiation pattern showed almost omnidirectional characteristics and the maximum gain was about 2.0dBi.

A Compact CPW-fed Antenna with Two Slit Structure for WLAN/WiMAX Operations (WLAN/WiMAX 대역에서 동작하는 두 개의 슬릿 구조를 갖는 CPW 급전방식 소형 안테나)

  • Kim, Woo-Su;Yoon, Joong-Han
    • The Journal of the Korea institute of electronic communication sciences
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    • v.17 no.5
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    • pp.759-766
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    • 2022
  • In this paper, we propose a multi-band small antenna with CPW(Coplanar Waveguide) feeding structure WLAN(Wireless Local Area Network) and WiMAX (Worldwide Interoperability for Microwave Access) bands. The proposed antenna is designed two slit in the modified monopole type radiator and FR-4 substrate, which is thickness 1.0 mm, and the dielectric constant is 4.4. The size of proposed antenna is 15.1 mm⨯16.41 mm, and total size of proposed antenna is 17.5 mm⨯16.4 mm. From the fabrication and measurement results, From the fabrication and measurement results, bandwidths of 439 MHz (2.06 to 2.499 GHz), 840 MHz (3.31 to 4.25) and 1,315 MHz (5.23 to 6.545 GHz) were obtained on the basis of -10 dB impedance bandwidth. Also, 3D radiation pattern characteristics of the proposed antenna are displayed and measured gains 2.24 dBi, 2.83 dBi, and 2.0 dBi shown in the three frequency band, respectively.

Design of internal dielectric ceramic antennas for IMT-2000 handset (IMT-2000용 단말기 내장형 유전체 세라믹 안테나 설계)

  • 심성훈;강종윤;박용욱;윤석진;윤영중;김현재
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.07a
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    • pp.968-971
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    • 2001
  • In this paper, internal antennas for IMT-2000 handset(1.92∼2.17 GHz) were designed to be capable of being mounted on the circuit-board with a CPW(coplanar waveguide) feeding structure. The chip antennas were miniaturized to a greater extent by fabricating multilayer high dielectric ceramic($\varepsilon$$\sub$r/=7.8) hexahedron. The proposed antennas has λ/4 monopole element with helical structure in the multilayer dielectric ceramic hexahedron. The simulated and measured results were invesgated with width, length, and thickness of helical structure in the hexahedron.

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Design of Circularly Polarized Multi Band Antenna for Non-Linear Junction Detector System (비선형 소자 탐지 시스템용 원편파 다중 공진 안테나의 설계)

  • Kim, Jeong-Won;Min, Kyoeng-Sik;Park, Chan-Jin;Jeong, Jae-Hwan;Lee, Sak;Kwon, Hae-Chan
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.3
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    • pp.292-299
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    • 2012
  • This paper proposes the design of circularly polarized multi band antenna for a non-linear junction detector (NLJD) system. In order to design for broad bandwidth, the CPW (Co-Planar Waveguide) feeding method is considered in this design. In order to realize the circular polarization, the axial ratio was controlled by inserting a $45^{\circ}$ inclined slot on radiating element and by cutting an edge of the radiating patch. Measurement results of return loss, bandwidth, axial ratio, polarization pattern and gain are agreed well with their simulation results in interested frequency band at 2.4~ 2.44 GHz, 4.84~4.92 GHz, and 7.28~7.32 GHz.

SRR and CSRR Loaded UWB Antenna with Tri-Band Notch Capability (SRR과 CSRR을 이용한 삼중 대역 차단 초광대역 안테나)

  • Yoo, Min-Yeong;Lim, Sung-Joon
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.3
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    • pp.320-327
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    • 2012
  • In this paper, a novel ultra wide band(UWB) antenna with tri-band notch capability is proposed. The proposed antenna can reject WiMAX(3.3~3.7 GHz), WLAN IEEE 802.11a/n(5.15~5.825 GHz), and ITU(8.025~8.4 GHz) bands. Band rejection capability is achieved only split ring resonators(SRRs) and complementary SRRs(CSRRs). The SRR under the radiating patch, the CSRR loaded on the radiating patch, and the CSRRs on the ground of the CPW feeding reject the WiMAX, WLAN, and ITU bands, respectively. The simulation and measurement results demonstrate the performances of the proposed antenna.

A Study on the Planar Sleeve Monopole Antenna for Digital TV Reception (디지털 TV 수신을 위한 평면 슬리브 모노폴 안테나에 관한 연구)

  • Lee, Yun Min;Lee, Sin Hee;Kang, Sang Won
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.10 no.2
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    • pp.21-27
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    • 2014
  • In this paper, a planar sleeve monopole antenna for indoor digital TV reception is presented. The antenna has broadband property with the planar monopole and ground of sleeve. Sleeve monopole and ground conductors of the antenna are on the same plane, and exited through CPW feeding. Sleeve monopole and ground of proposed antenna exist on coplanar plane, and excite as CPW. It used FR4 epoxy dielectric substrate of ${\varepsilon}r=4.4$, and the size is $20[mm]{\times}170[mm]{\times}1.6[mm]$ dimension. So the internal antenna is suitable. The measurement results of the fabricated antenna, return loss is larger than -10 [dB] in 470~806 [MHz]. Maximum gain is 0.59 [dBi] on E-plane at 810 MHz and 1.70 [dBi] on H-plane at 640 [MHz]. Radiation pattern is about the same that of dipole antenna at all frequency.

Design of Miniaturization Terminal Antenna for 2.4 GHz WiFi Band with MZR (MZR을 이용한 2.4 GHz WiFi 대역 소형 단말기 안테나 설계)

  • Lee, Young-Hun
    • Journal of IKEEE
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    • v.23 no.1
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    • pp.14-21
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    • 2019
  • In this paper, we implemented an on-board miniaturization antenna operating 2.4 GHz using MZR(Mu Zero Resonator). It is must be operating under the constraint that the size of the small terminal PCB should be $78{\times}38{\times}0.8mm^3$ and the size of the system should be $63{\times}38{\times}0.8mm^3$ and the size of the radiating part should be $15{\times}38{\times}0.8mm^3$. The feeding structure uses a CPW structure for stable feeding and a feeding point at the upper left of the system board. A magnetic field coupling structure is used for coupling the feeding part and the antenna. The resonance frequency of the MZR is determined by the series inductance and capacitance of the cell, so the gap between the cells, the length of the cell, the length of the interdigital capacitor, and the spacing between the radiation part and the ground plane are analyzed. The antenna was designed and fabricated using the results. The total size of the antenna including the feed structure is $20.8{\times}9.0{\times}0.8mm^3$, and the electrical length is $0.1664{\lambda}_0{\times}0.072{\lambda}_0{\times}0.0064{\lambda}_0$. The measurement result for 10 dB bandwidth, gain and directivity are 440 MHz(18.3%), 0.4405 dB, and 2.722 dB respectively. It is confirmed that the radiation pattern has omnidirectional characteristics and it can be applied to ultra small terminal antenna.

UWB Antenna with Band Rejection Characteristic (대역 저지 특성을 갖는 UWB 안테나)

  • Na, In-Su;Park, Sung-Kyo;Park, Chong-Baek
    • Proceedings of the IEEK Conference
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    • 2007.07a
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    • pp.77-78
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    • 2007
  • A planar UWB antenna using partial ground and CPW feeding is designed and fabricated. We obtained the return loss of average -8.2 dB in Low Band ($3.1\;GHz{\sim}4.8\;GHz$) and the good band rejection characteristic in the range of $4.9\;GHz{\sim}6.8\;GHz$. The simulation results by HFSS are seen to be in good agreement with the measured results.

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Broadband Patch Antenna with the Air-Dielectric for the Human Counting System (휴먼 카운팅 시스템을 위한 공기 유전체 층을 갖는 광대역 패치 안테나)

  • Choi, Hyun-Ho;Yun, Tae-Soon
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.4
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    • pp.539-544
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    • 2017
  • In this paper, the broadband patch antenna for human counting systems is designed and fabricated using by the air dielectric substrate. Proposed antenna has a patch structure of the square structure with a 5 mm air layer and the vertical connection between the patch antenna and CPW feeding line is realized the stepped impedance structure. Optimized antenna through a 3D EM simulator is fabricated on a jig by manufacturing an antenna jig using a 3D printer with a size of 16.6 * 16.6 * 5 mm3. Proposed antenna is measured with the maximum gain of 5.71 dBi and the VSWR of below 2:1 at a frequency of 7.2 to 9.8 GHz. Also, a half power beam width characteristic of the antenna is measured $70^{\circ}$.

A Parabolic Edge Planar Monopole Antenna for Indoor Digital TV Reception (디지털 TV 실내 수신을 위한 포물선 엣지 형태의 평면 모노폴 안테나)

  • Leem, Jong-Ye;Hur, Jung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.11
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    • pp.1225-1232
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    • 2009
  • In this paper, a parabolic edge planar monopole antenna for indoor DTV reception is presented. The antenna has broadband property with the planar monopole and ground of parabolic edges. It is designed close to self-complementary structure as changing curvature of edges of monopole and ground. Monopole and ground conductors of the antenna are on the same plane, and excited through CPW feeding. It is fabricated on an FR4 dielectric substrate of $\varepsilon_r=4.4$, and the dimension is $40\;mm{\times}200\;mm{\times}1.6\;mm$. Return loss is larger than 10 dB in 470~806 MHz. Maximum gain is 1.86 dBi on E-plane at 810 MHz and 3.86 dBi on H-plane at 600 MHz.