• Title/Summary/Keyword: slot in the ground plane

Search Result 106, Processing Time 0.021 seconds

Hybrid Planar Inverted-F Antenna with a T-Shaped Slot on the Ground Plane

  • Jeon, Sin-Hyung;Choi, Hyeng-Cheul;Kim, Hyeong-Dong
    • ETRI Journal
    • /
    • v.31 no.5
    • /
    • pp.616-618
    • /
    • 2009
  • In this letter, a novel hybrid planar inverted-F antenna (PIFA) with a T-shaped slot on the ground plane is proposed. The loop structure formed by the feed line and shorting pin can be operated as a series and shunt inductance for the PIFA and the T-shaped slot antenna, respectively. The PIFA operates at a frequency of 1.75 GHz, while the T-shaped slot on the ground plane operates at 2.4 GHz by the same voltage feeding source. The height of the PIFA is 6.5 mm, and the size of an upper patch is designed to be 30 mm${\times}$16 mm. The measured relative impedance bandwidth of the PIFA and the T-shaped slot are about 12% and 21%, respectively. In addition, good antenna performance was achieved.

A 42-GHz Wideband Cavity-Backed Slot Antenna with Thick Ground Plane

  • Lee, Jong-Moon;Cho, Young-Heui;Pyo, Cheol-Sig;Choi, Ik-Guen
    • ETRI Journal
    • /
    • v.26 no.3
    • /
    • pp.262-264
    • /
    • 2004
  • We investigate the characteristics of a wideband and high-gain cavity-backed slot antenna in terms of the reflection coefficients, radiation patterns, and gain. A cavity-backed slot antenna structure includes baffles, reflectors, and thick ground planes. The measured gain and bandwidth of a 10-dB return loss in a cavity-backed $2{\times}2$ array slot antenna with $h_1=2 $mm, d=2 mm are 15.5 dBi and nearly 27%, respectively, at 42 GHz. Baffles and reflectors are used to increase antenna gain, thus reducing the coupling among the slots on the thick ground plane.

  • PDF

A Design of Variable Attenuator for MMIC using Slot in the Ground Plane (접지면의 슬롯을 이용한 마이크로파 집적회로용 가변 감쇠기의 설계)

  • 김기래
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.7 no.6
    • /
    • pp.1109-1114
    • /
    • 2003
  • In this paper, the electric characteristic of the SGPS with slot in the ground plane is similar to the parallel resonant circuit. When the slot length in SGPS is equal to the half wavelength of specific frequency, the characteristic of SGPS represent the large attenuation at the specific frequency. We found out the relation between attenuation and resistor on the slot in SGPS and we designed the variable attenuator for MMIC using the variable resistor. This attenuator can be applied to AGC circuit in transceiver if the PIN diode is used replace for resistor.

EMI Analysis on Microstrip Line with Defected Ground plane (결함구조를 갖는 접지면을 고려한 마이크로 스트립 선로의 EMI 분석)

  • Oh Sang-Bae;Kim Hyeong-Seok;Choi Kyoung
    • 한국정보통신설비학회:학술대회논문집
    • /
    • 2006.08a
    • /
    • pp.158-161
    • /
    • 2006
  • In this paper, we deal with EMI Analysis on Microstrip with Defected Ground plane. Specially, we investigate reflection, transmission, crosstalk, radiated emission on Microstrip with Defected Ground plane structure. And investigates undesired effects on various defected ground plane such as ground with split, slot, short end and open end gap. To analyze reflection, transmission and crosstalk of microstrip with defected ground plane, we used concept of the microstrip to slot line transition model. Besides, investigate radiated emission using FDTD Commercial tools such as CST MW

  • PDF

A Broadband Monopole Antenna with Ring Loop By Modified Ground Plane (접지면 변형에 의한 원형 루프를 갖은 광대역 모노폴 안테나)

  • Lee, Hyeon-Jin;Lim, Yong-Moo
    • The Transactions of the Korean Institute of Electrical Engineers P
    • /
    • v.61 no.3
    • /
    • pp.149-152
    • /
    • 2012
  • In this paper, a wideband monopole antenna with ring loop by modified ground plane is presented. The proposed antenna consist of monopole antenna, ring loop by ground plane. This antenna is fed CPW-fed and wide slot antenna of a novel structure for broadband characteristics is proposed. To enhance the impedance bandwidth of the wide slot antenna, we proposed the wide slot structure with CPW-fed which is combined with four ${\lambda}/2$ rectangular radiation modified monopole and inductively coupled. The measured impedance bandwidth is about 2.5 GHz(3.65~6.15 GHz) then less -10 dB.

A Simple Model for a DGS Microstrip Line with Stepped Impedance Slot-Lines

  • Woo, Duk-Jae;Lee, Taek-Kyung;Nam, Sangwook
    • Journal of electromagnetic engineering and science
    • /
    • v.15 no.1
    • /
    • pp.26-30
    • /
    • 2015
  • In this paper, a simple equivalent circuit model for a defected ground structure (DGS) microstrip line with stepped impedance slot-lines in the ground plane is presented. In addition, an analytic expression for the resonance frequency of the proposed structure is derived. In equivalent circuit modeling, the capacitance and the inductance of the resonance circuit are evaluated from the dimensions of the etched pattern in the ground plane. The resonance frequencies calculated from the proposed method are compared with those obtained with an electromagnetic (EM) simulation.

The Properties of Open-Ended Meander Slot Antenna and its Applications to Antenna Design

  • Lee, Young-Soon
    • Journal of Navigation and Port Research
    • /
    • v.35 no.7
    • /
    • pp.563-568
    • /
    • 2011
  • The various properties such as the electric current distribution, resonant frequency and radiation patterns of open-ended meander slot antenna placed on a small ground plane, are investigated to give the help in performing antenna design. Based upon these characteristics, the designed antenna which is only 22mm($0.06{\lambda}_g$) in height and 31mm($0.09{\lambda}_g$) in width can operate at the 433 MHz with the measured radiation efficiency of 8% and end-fire radiation pattern. These properties make the antenna suitable for the handheld device such as the wireless remote controller.

Design and Manufacture of Modified Ring antenna with Stub and Ground Slot for WLAN Applications (WLAN 시스템에 적용 가능한 그라운드 슬롯과 stub를 갖는 변형된 링 안테나 설계와 제작)

  • Koo, Yung-Seo;Im, Dae-Soo
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.17 no.10
    • /
    • pp.2265-2272
    • /
    • 2013
  • In this paper, a dual-band circular ring monopole antenna with stub and ground slot for is proposed WLAN(Wireless Local Area Networks) applications. The proposed antenna is based on a planar monopole design, and composed of one circular ring of radiating patches, and modified feed line, and rectangular slot in the ground plane for dual-band operation. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that effect antenna characteristics. Using the obtained parameters, the antenna is fabricated, and the return loss coefficient, gain, and radiation patterns are determined for WLAN application.

Design of a Short/Open-Ended Slot Antenna with Capacitive Coupling Feed Strips for Hepta-Band Mobile Application

  • Keum, Kyoseung;Piao, Haiyan;Choi, Jaehoon
    • Journal of electromagnetic engineering and science
    • /
    • v.18 no.1
    • /
    • pp.46-51
    • /
    • 2018
  • In this paper, a planar printed hybrid short/open-ended slot antenna with capacitive coupling feed strips is proposed for hepta-band mobile applications. The proposed antenna is comprised of a slotted ground plane on the top plane and two capacitive coupling feed strips with a chip inductor on the bottom plane. At the low frequency band, the short-ended long slot fed by strip 1 generates its half-wavelength resonance mode, whereas the T-shaped open ended slot fed by strip 2 generates its quarter-wavelength resonance mode for the high frequency band. The antenna provides a wide bandwidth covering GSM850/GSM900/DCS/PCS/UMTS/LTE2300/LTE2500 operation bands. Moreover, the antenna occupies a small volume of $15mm{\times}50mm{\times}1mm$. The operating principle of the proposed antenna and the simulation/measurement results are presented and discussed.

Design of Miniaturized Wideband Tapered Slot Antenna Using Slots Combining Fan-shaped Structures (부채꼴 구조를 조합한 슬롯을 이용한 소형 광대역 테이퍼드 슬롯 안테나 설계)

  • Junho Yeo;Jong-Ig Lee
    • Journal of Advanced Navigation Technology
    • /
    • v.27 no.5
    • /
    • pp.629-634
    • /
    • 2023
  • In this paper, the design of a miniaturized wideband tapered slot antenna using slots combining various types of fan-shaped structures was studied. To miniaturize the tapered slot antenna and make it operate at low frequencies, slots combining fan-shaped structures were added to the ground plane of the tapered slot antenna. The miniaturization design process of the final proposed antenna was systematically explained by comparing the input reflection coefficient and gain variations when each fan-shaped structure was appended, compared to when there was no slot. The proposed miniaturized wideband tapered slot antenna using slots combining the fan-shaped structures was fabricated on an RF-35 substrate and its measured characteristics were compared with the simulation results. Experiment results show that the frequency band with a voltage standing wave ratio (VSWR) less than 2 was 2.59-11.39 GHz, and gain within the band was measured to be 3.3-7.0 dBi. The proposed miniaturized wideband tapered slot antenna can be reduced in size by 36.9%, compared to when there are no slots in the ground plane.