• Title/Summary/Keyword: CPWG

Search Result 6, Processing Time 0.026 seconds

Study on the CPWG Antenna of 1.8GHz (1.8GHz 대역용 CPWG 안테나 연구)

  • Park, Yong Wook
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.17 no.2
    • /
    • pp.259-264
    • /
    • 2016
  • In this study, the properties of a patch antenna fed by a coplanar waveguide with ground (CPWG) and design method were studied. The antenna was impedance-matched to the CPWG feedline by adjusting the width, length, and position of the patch. To improve the frequency properties of the CPWG type antenna, patch length, patch width, patch position, and ground distance were simulated using HFSS (High Frequency Structure Simulator) simulation program. A CPWG antenna of 1.8 GHz for LTE band was designed and fabricated by photolithography on an FR4 substrate (dielectric constant of 4.4 and thickness of 0.8 mm). The fabricated antenna was analyzed using a network analyzer. The measured results agree well with the simulations, which confirmed the validity of this study. The fabricated CPWG antenna showed a center frequency, minimum return loss and -10dB bandwidth of 1.8GHz, -32.1dB, 22MHz and $50.2{\Omega}$ respectively. The proposed antenna is expected to be applicable to the LTE band.

Design and Fabrication of the Antenna for Wibro and WLAN Communications Using CPWG Structure (CPWG 구조를 이용한 Wibro 및 WLAN 통신용 안테나 설계 및 제작)

  • Lee, Seung-Woo;Kim, Nam;Rhee, Seung-Yeop
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.19 no.10
    • /
    • pp.1086-1095
    • /
    • 2008
  • In this paper, we designed and fabricated the trapezoidal antenna using the CPWG structure for Wibro and WLAN communications. This antenna has broadband characteristics using the basic trapezoidal antenna, and an H-shaped parasitic patch is making an expansion of resonance bandwidth and bringing stability of impedance matching. Especially, CPWG structure is combined two kinds of the structure which of a monopole antenna and a coplanar waveguide antenna. They make up for the weak point of the CPW which is variation of impedance matching according to varying the gap or size of the feed line and the ground. The designed antenna has occurred resonances of which the band of 2.2 GHz to 4.6 GHz(70.5 %) below the return loss of -10 dB($VSWR{\leq}2$) obtained in measurement, and it has an omnidirectional radiation pattern of H-plane. In addition, the changes of impedance matching appear slightly caused by the effects of the ground plane and the feed line.

Design of a Multi-Band Antenna with CPWG Feed Line for the Telematics Mobile Device (Telematics 단말기를 위한 CPWG 급전방식 다중대역 안테나 설계 및 제작)

  • Jee, Bong-Soo;Jeong, Gye-Taek;Kim, Woo-Soo;Lee, Haw-Choon;Kwak, Kyung-Sup
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.8 no.2
    • /
    • pp.67-74
    • /
    • 2009
  • In this paper, the multi-band antenna with CPWG(Coplanar Waveguide with Ground) feed for telematics mobile devices is designed and fabricated. The proposed antenna improves the return loss characteristic by using open-circuited stub matching and rectangular slot in the radiation patch. In addition, CPWG structure makes up for the drawback of the CPW which is variation of impedance matching according to the gap variation of the feed line and the ground. The fabricated antenna has 1.4GHz ($1.43GHz{\sim}2.83GHz$, 65%) band width on -10dB (VSWR<2) and the maximum gains are 0.8dBi, 1.34dBi, 2.41dBi, 2.53dBi, 2.6dBi and 1.51dBi on each resonant frequency that are GPS $(1.564GHz{\sim}1.585GHz)$, PCS/DCS $(1.710GHz{\sim}1.984GHz)$, WCDMA $(2.170GHz{\sim}2300GHz)$, Bluetooth/Wi-Fi/WLAN $(2.4GHz{\sim}2.483GHz)$, WiBro $(2.3GHz{\sim}2.4GHz)$, SDMB $(2.605GHz{\sim}2.655GHz)$. It also has an omni-directional radiation pattern of H-Plane.

  • PDF

Dual T type antenna study for LTE communication (LTE용 이중 T 안테나 연구)

  • Park, Yong-Wook
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.10 no.1
    • /
    • pp.7-12
    • /
    • 2015
  • In this paper, we studied the design and fabrication of dual T type antenna to be used in LTE communication systems operating at around 1.8 GHz band. In order to improve of frequency properties of antenna, single feed microstrip patch antenna and CPWG antenna was simulated by HFSS(High Frequency Structure Simulator). The fabricated dual T type antennat showed that the measured center frequency, the minimum return loss and -10dB bandwidth were 1.79 GHz, -23.26 dB and 23 MHz, respectively.

Desing of an internal Antenna for Hepta-Band Using CPWG-fed (CPW급전 구조 Hepta-Band 내장형 안테나 설계 및 제작)

  • Han, Dong-Wan;Jeong, Gye-Taek;Lee, Cheon-Hee;Lee, Hwa-Choon;Kwak, Kyung-Sup
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.33 no.9A
    • /
    • pp.934-940
    • /
    • 2008
  • In this paper, an antenna accessible to the Hepta-Band (GPS, DCS, PCS, UMTS, Wibro, Bluetooth and S-DMB) is designed and fabricated. To get broadband characteristics with small size, we propose a structure of Coplanar Waveguide-fed with Ground, which is based on a monopole antenna. Simulation is performed by adjusting the size of distance between a length of radiation patch and ground plane. The designed antenna satisfies the frequency bandwidth of 1.430Hz$\sim$2.9GHz(67.89%), the gain of $1.3{\sim}3.7dBi$ and an omni-directional radiation pattern at VSWR<2.

3-D Beam Steering Antenna for Intelligent Beam-reconfigurable System (지능형 빔 재구성 시스템을 위한 3-D 빔 조향 안테나)

  • Lee, Chang Yong;Kim, Yong-Jin;Jung, Chang Won
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.13 no.10
    • /
    • pp.4773-4779
    • /
    • 2012
  • In this paper we propose two types of reconfigurable 3-D beam steering antenna for intelligent or smart antenna system. Proposed antennas are composed of triangular(structure1.) or circuler(structure2.) loop structure and bended dipole antenna structure. This antenna can steer beam pattern of 6 direction at xy-plane state (0, 1, 2) and xz-plane state (3, 4, 5) by 4 switch motion with one antenna element. Antenna structure1. is symmetric equilibrium structures based on feeding point. There is no grounding point. As a result, designed antenna's gain is similar to dipole antenna. Also, As unbalanced structure by using CPWG in the form of a semicircular, structure2. is enhanced directivity. The operation frequency of antenna are 2.5 GHz(Structure1.) and 2.55 GHz(Structure2.), maximum gain is 1.04 ~ 2.06 dBi(Structure1. : Omni-directional beam), 1.6 ~ 4 dBi(structure2. : Directional beam). The overall HPBW is about over $160^{\circ}$ in the both of the xy-plane and xz-plane at structure1. and over $125^{\circ}$ at structure2.