• Title/Summary/Keyword: Square Patch Antenna

Search Result 11, Processing Time 0.165 seconds

Design and Implementation of Mutiple Slotted Dual-Band Square Patch Antenna with Circular Polarization (다수의 슬롯을 이용한 이중대역 원형편파 사각 패치 안테나 설계 및 구현)

  • Kim, Hyuck-Jin;Kim, Sung-Min;Yang, Woon-Geon
    • Proceedings of the IEEK Conference
    • /
    • /
    • pp.123-126
    • /
    • 2005
  • In this paper, we propose a multiple slotted dual-band square patch antenna with CP(Circular Polarization) characteristic. And we present the simulation and measurement results of the design example. We designed a slotted patch antenna by using computer simulation program, Zeland IE3D, and then some tuning followed with measurements. Measured -10dB bandwidths of $S_{11}$ characteristic are 127MHz($2.346GHz{\sim}2.473GHz$) for the low-band, and 122MHz($3.379GHz{\sim}3.501GHz$) for the high-band, respectively. And measured maximum gains and half-power beamwidths are 6.94dBi, $72.95^{\circ}$ for the low-band at 2.30GHz, 5.78dBi, $76.51^{\circ}$ for the high-band at 3.45GHz, respectively.

  • PDF

Design and Implementation of Single-Feed Dual-Band Circular Polarization Square Patch Antenna for GPS and DMB (GPS/DMB 수신용 단일 급전 이중 대역 원형 편파 사각 패치 안테나 설계 및 구현)

  • Yoon, Ki-Suk;Kim, Hyuck-Jin;Yang, Woon-Geun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.19 no.2
    • /
    • pp.138-144
    • /
    • 2008
  • In this paper, we propose a novel single-feed dual-band circular polarization square patch antenna for GPS(global positioning system)/DMB(digital multimedia broadcasting) receiver. The proposed antenna has folded slots at the 4 corners and a diagonal slot at the center of the square patch. The measured -10 dB impedance bandwidths of the proposed antenna were 84 MHz ranging from 1.516 GHz to 1.600 GHz for the low frequency band(GPS) and 109 MHz ranging from 2.596 GHz to 2.705 GHz for the high frequency band(DMB). The measured peak linear antenna gains of the proposed antenna were 6.23 dBi at 1.575 GHz for GPS and 6.97 dBi at 2.642 GHz for DMB band.

Design and Fabrication of Singly fed Circularly Polarized Patch Antenna with 2-stage LNA (2단 LNA를 결합한 단일급전 원편파 패치안테나의 설계 및 제작)

  • Yun, Li-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.12 no.10
    • /
    • pp.1731-1736
    • /
    • 2008
  • In this paper, singly fed circularly polarized nearly-square patch antenna for receiving S-DMB is presented. It used teflon substrate of relative dielectric constant ${\in}_{\gamma}=2.2$ and the sire is $40{\times}40{\times}15[mm]$. Experimental results of fabricated antenna show that input return loss and axial ratio are about 22MHz, 25MHz at the center resonant frequency, respectively. And fabricated LNA has gain of 27.5 [dB], NF of 1.27 [dB], input return loss of -15.4 [dB] and output return loss of -18.9 dB, respectively. Simulation results and experimental results are good agreements. This proposed antenna is well able to handheld gadgets for receiving S-DMB.

A Polarization Diversity Patch Antenna with a Reconfigurable Feeding Network

  • Lee, Sung Woo;Sung, Youngje
    • Journal of electromagnetic engineering and science
    • /
    • v.15 no.2
    • /
    • pp.115-119
    • /
    • 2015
  • This paper proposes a reconfigurable square-patch antenna with polarization diversity. The proposed antenna consists of a square radiating patch and a Y-shaped feed structure with two PIN diodes. The shape of the feed structure can be changed by adjusting the bias states of the two PIN diodes, which helps switch between two orthogonal linear polarizations. The polarization diversity characteristic is validated by the simulated current distribution and the measured radiation pattern.

400MHz Band Small Meander Microstrip Antenna (400MHz대 소형 미앤더 마이크로스트립 안테나)

  • Seo Yong Gun;Yoon Chun Su;Park Dong Kook
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • /
    • pp.5-8
    • /
    • 2004
  • In this paper, a novel 400MHz band small meander microstrip antenna is proposed the shape of the proposed antenna is a waved meander microstrip with a pair rf short pins on th£ edge. the length of waved meander microstrip is $\lambda_g/4$ but it bends to half its size. Therefore, the total size of the proposed antenna is reduced to about 1/20 which is compared with a square patch antenna the simulated antenna gain is about 3dBi at 424MHz. the proposed antenna of -10dB impedance bandwidth is measured about $1.4\%$.

  • PDF

A Compact Microstrip Patch Antenna Based on Metamaterials for Wi-Fi and WiMAX Applications

  • Nelaturi, Suman;Sarma, Nookala Venkata Satya Narasimha
    • Journal of electromagnetic engineering and science
    • /
    • v.18 no.3
    • /
    • pp.182-187
    • /
    • 2018
  • A low profile asymmetrical fractal boundary patch antenna based on reactive impedance surface (RIS) and a mushroom unit cell (MUC) is proposed and studied for dual band operation. The sides of the square patch antenna are replaced with asymmetrical half circled fractal curves for circular polarization operation at patch mode band. The fractal patch antenna is loaded with MUC for dual band operation. The antenna radiation characteristics are investigated and illustrated with both simulated and experimental results in detail. The 10-dB return loss bandwidth are 8.48% (3.21-3.49 GHz) and 2.59% (2.30-2.36 GHz) at upper and lower resonance frequencies, respectively. The 3-dB axial ratio bandwidth is 4.26% (3.21-3.35 GHz). A close agreement between simulation data with experimental results is observed.

Reconfigurable Circularly Polarized Microstrip Antenna on a Slotted Ground

  • Yoon, Won-Sang;Han, Sang-Min;Pyo, Seong-Min;Lee, Jae-Hoon;Shin, In-Chul;Kim, Young-Sik
    • ETRI Journal
    • /
    • v.32 no.3
    • /
    • pp.468-471
    • /
    • 2010
  • A compact square patch antenna with reconfigurable circular polarization (CP) at 2.4 GHz is proposed. Circular polarization is generated by an arc-shaped slot on the ground plane. In order to switch the CP orientation, the current flow direction of the patch is reconfigured via the PIN diodes mounted on the slot. As the slot and bias circuit are not placed on the patch side, the proposed antenna radiates a CP wave without alteration in the main beam direction. From the experimental results, the impedance and CP bandwidths of the proposed antenna have been demonstrated for up to 80 MHz and 25 MHz, respectively.

The Characteristics of Koch Island Microstrip Patch Antenna

  • Kim, Il-Kwon;Yook, Jong-Gwan;Park, Han-Kyu
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.28 no.3A
    • /
    • pp.166-170
    • /
    • 2003
  • In this paper, the characteristics of Koch island microstrip patch antenna are investigated by numerical and experimental methods. The Koch patch is fractal shaped antenna which can be characterized by two properties such as space-filling and self-similarity. Due to its space-filling property of fractal structure, the proposed Koch fractal patch antennas are smaller in size than that of conventional square patch antenna. From numerical and experimental results, it is found that as the iteration number and iteration factor of Koch patch increase, its resonance frequency becomes lower than that of conventional patch, thus contributes to antenna size reduction. In particular, when the fractal iteration factor is 1/4, the fractal antenna is 45% smaller in size than that of conventional patch, while maintaining radiation patterns comparable to those of rectangular antenna and cross polarization level is about -20~-14 dB.

Double Square Patch Antenna with Inductive Bridges for WLAN Dual-Band (인덕티브 브릿지를 가진 WLAN 이중 대역 이중 사각 패치 안테나)

  • Yang, Chan-Woo;Jung, Chang-Won
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.10 no.10
    • /
    • pp.2615-2618
    • /
    • 2009
  • Double rectangular patch with 4-bridges is investigated for solution of IEEE 802.11b/g (2.4 GHz) and 802.11a (5.5 GHz). Rectangular patch for 5.5 GHz frequency band is printed on the PCB substrate and connected to another rectangular patch for 2.4 GHz frequency band with 4-bridges to obtain dual band operation in an antenna element. 4-bridges can modify the desired frequency band from its original frequency band by changing its width. Gain of 2.4 GHz patch is 5 dBi and 5.5 GHz patch is 3.7 dBi at ${\theta}=0^{\circ}$.

Miniaturization of Aperture-Coupled RHCP Patch Antenna (개구면 결합 원형분극 패치 안테나의 소형화)

  • Park Byung-Woo;Jeong Bong-Sik
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.6 no.4
    • /
    • pp.198-205
    • /
    • 2005
  • In this paper, the miniaturization of aperture-coupled RHCP patch antenna for the GPS system is treated. Circularly polarization characteristics is implemented by truncating diagonal corners of the square patch. Antenna size is reduced by inserting four uniform slits at the patch edges, which was equivalently lengthened the surface current by meandering it, This antenna uses aperture-coupled feeding structure with crossed-slot shape in order to give easy miniaturization of RHCP patch antenna. Simulated and measured results show that $42.7\%$ lower antenna size is obtained, and also $56\%$ lower -10dB bandwidth and $38.5\%$ lower 3dB AR bandwidth are obtained. when the proposed design scheme is applied to a commercial GPS antenna structure, $42.9\%$ lower patch size and $56\%$ lower 3dB AR bandwidth compared to commercial antenna at the same frequency are obtained.

  • PDF