• Title/Summary/Keyword: patch

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Design of a Compact Broadband Stacked Microstrip Patch Antenna (광대역 적층 마이크로스트립 패치 안테나의 소형화 설계)

  • Kim, GunKyun;Rhee, Seung-Yeop;Yeo, Junho;Lee, Jong-Ig;Kim, Ohn
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.10a
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    • pp.72-73
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    • 2016
  • In this paper, we studied a method for miniaturizing a broadband stacked patch antenna structure which is widely used for bandwidth improvement. Main patch is a rectangular microstrip patch antenna fed by a 50-ohm microstrip line, and a parasitic patch is laid above the main patch. The size of the main patch is designed to be resonated near the center frequency of the desired frequency band. Then parasitic patch longer than main patch is placed above the main patch. The distance between two patches might be adjusted so as to achieve impedance matching using a shunt open stub. The shunt matching stub is inserted underneath the parasitic patch and so it does not require additional space, which enables the proposed antenna structure to be advantageous in miniaturizing antenna. The effects of the various parameters on the antenna performance are examined, and we introduced the design procedure for the proposed antenna to operate in the frequency range of 2.3-2.7 GHz.

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Design of 60-GHz Back-to-back Differential Patch Antenna on Silicon Substrate

  • Deokgi Kim;Juhyeong Seo;Seungmin Ryu;Sangyoon Lee;JaeHyun Noh;Byeongju Kang;Donghyuk Jung;Sarah Eunkyung Kim;Dongha Shim
    • Journal of the Semiconductor & Display Technology
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    • v.22 no.4
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    • pp.142-147
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    • 2023
  • This paper presents a novel design of a differential patch antenna for 60-GHz millimeter-wave applications. The design process of the back-to-back (BTB) patch antenna is based on the conventional single-patch antenna. The initial design of the BTB patch antenna (Type-I) has a patch size of 0.66 × 0.98 mm2 and a substrate size of 0.99 × 1.48 mm2. It has a gain of 1.83 dBi and an efficiency of 94.4% with an omni-directional radiation pattern. A 0.4 mm-thick high-resistivity silicon (HRS) is employed for the substrate of the BTB patch antenna. The proposed antenna is further analyzed to investigate the effect of substrate size and resistivity. As the substrate resistivity decreases, the gain and efficiency degrade due to the substrate loss. As the substrate (HRS) size decreases approaching the patch size, the resonant frequency increases with a higher gain and efficiency. The BTB patch antenna has optimal performances when the substrate size matches the patch size on the HRS substrate (Type-II). The antenna is redesigned to have a patch size of 0.81 × 1.18 mm2 on the HRS substrate in the same size. It has an efficiency of 94.9% and a gain of 1.97 dBi at the resonant frequency of 60 GHz with an omni-directional radiation pattern. Compared to the initial design of the BTB patch antenna (Type-I), the optimal BTB patch antenna (Type-II) has a slightly higher efficiency and gain with a considerable reduction in antenna area by 34.8%.

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Compact L Shape Shorted Pin Patch for Local Oscillator Port of X-, K-, Ka-Band Radar Detector (Radar Detector의 국부 발진단에 적용 가늘한 X, K, Ka 대역 L 모양의 소형 Shorted Pin Patch)

  • Ko, Seung-Tae;Kim, Han-Yong;Lee, Hyun-Taek;Park, Jae-Kyu;Lee, Jeong-Hae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.8
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    • pp.854-861
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    • 2007
  • In this paper, a compact L-shaped shorted pin patch to be used at local oscillator port in radar detector is proposed. Shorted pin patch operates as short-open cavity while conventional patch operates as open-open cavity. Shorted pins are L-shaped to obtain quarter wave length and three-quarter wave length resonance for the fundamental(X-band) and $2^{nd}(3^{rd})$(K- and Ka-band) mode resonance frequency, respectively. Thus, the proposed patch can be compact. It is also possible to operate at triple band(X-, K-, Ka-band) with small return loss in radar detector, It is expected that shorted pin patch could improve radar detector sensitivity.

Formulation and Evaluation of Controlled Release Patch Containing Naproxen (나프록센 함유 방출제어형 패취의 제제설계 및 평가)

  • Rhee, Gye-Ju;Hong, Seok-Cheon;Hwang, Sung-Joo
    • Journal of Pharmaceutical Investigation
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    • v.29 no.4
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    • pp.343-348
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    • 1999
  • The purpose of this study is to prepare the controlled release adhesive patch containing naproxen. Pressuresensitive adhesive (PSA)-type patch was fabricated by casting of polyisobutylene (PIE.) and mineral oil in toluene. Membrane-controlled release (MCR)-type patch was prepared by the attachment of the controlled release membrane on the PSAtype patch. The membrane was mainly composed of Eudragit, polyethylene glycol(PEG) and glycerin. The drug release profile and skin permeation test with various patches were evaluated in vitro. The release of naproxen from PIE-based PSAtype patch with various loading doses fitted Higuchi's diffusion equation. However, the permeation of naproxen through hairless mouse skin from PSA-type patch followed zero-order kinetics. In MCR-type patch, thickness of controlled release membrane affected on the drug release rate highly. In the composition of membrane, the release rate was decreased as the ratio of Eudragit increased. The drug release from the MCR-type patch followed zero order kinetics. The permeation of naproxen through hairless mouse skin from MCR-type patch showed lag time for the intial release period and didn't fit the zero-order kinetics

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Effect of stacking sequence of the bonded composite patch on repair performance

  • Beloufa, Hadja Imane;Ouinas, Djamel;Tarfaoui, Mostapha;Benderdouche, Noureddine
    • Structural Engineering and Mechanics
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    • v.57 no.2
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    • pp.295-313
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    • 2016
  • In this study, the three-dimensional finite element method is used to determine the stress intensity factor in Mode I and Mixed mode of a centered crack in an aluminum specimen repaired by a composite patch using contour integral. Various mesh densities were used to achieve convergence of the results. The effect of adhesive joint thickness, patch thickness, patch-specimen interface and layer sequence on the SIF was highlighted. The results obtained show that the patch-specimen contact surface is the best indicator of the deceleration of crack propagation, and hence of SIF reduction. Thus, the reduction in rigidity of the patch especially at adhesive layer-patch interface, allows the lowering of shear and normal stresses in the adhesive joint. The choice of the orientation of the adhesive layer-patch contact is important in the evolution of the shear and peel stresses. The patch will be more beneficial and effective while using the cross-layer on the contact surface.

Design and Implementation of Koch curve Microstrip Patch Antenna for Antenna Miniaturization (안테나 소형화를 위한 koch curve 마이크로스트립 패치 안테나 설계 및 구현)

  • Kim, Sun-Woong;Lim, Dong-Seob;Kim, Young-Gon;Choi, Dong-You
    • Journal of Information Technology Services
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    • v.12 no.3
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    • pp.323-330
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    • 2013
  • In this paper, miniaturized patch antenna operating at ISM band has been designed by applying the fractal technique. Various type of antenna structure, microstrip patch antenna and koch curve microstrip patch antenna has been proposed and simulated using Ansoft HFSS (High Frequency Structure Simulator). The area of microstrip patch antenna and koch microstrip patch antenna is 1,058 $mm^2$, and 891 $mm^2$ respectively, showing the size reduction ratio of 16%. The finally made koch curve microstrip patch antenna resonates at 2.45GHz with return loss of 22.69dB, VSWR of 1.2142, and antenna radiation gain of 3.26dBi.

The Design of Rectangular Microstrip Patch Antenna Using The Ring Feed Line (링 급전선로를 이용한 Rectangular Microtrip Patch Antenna 설계)

  • 고영혁;양규식;이종악
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.14 no.5
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    • pp.435-441
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    • 1989
  • The three rectangular microstrip patch antenna of Resonant length, lambda/2 or , between two slot is designed by using the ring feed line, and the radiation pattern characteristic is showen. In case of the antenna of resonant length lambda/2 the radation pattern is shown at each antenna element, in the antenna of resonant length it is shown among patch antenna element.

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Bicubic Patch체 의한 보간곡면의 모델링 및 가공에 관한 연구

  • 이진모;이동주
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.1025-1030
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    • 1997
  • In this study,the procedure of interpolation surface modeling on bicubic spline patch equation and NC machining are presented. The procedure consists of three parts : patch modeling,cutter location data generation,post processing and NC milling machining. For generation of the cutter location data,tangent vectors and units normal vectors on the patch must be calculated. In order to investigate the properties of the interpolation surface created by bicubic spline patch, two kinds of end conditions, clamped end condition and relaxed end condition,were applied in this study. The shape of the patch depends on the magnitide of the tangent vectors and twist vectors at the corners of bicubic surface patch. the patch generated by relaxed end condition more approximated to the surface patch which was given.

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High Gain Metamaterial Patch Antenna for 2.4GHz Band using New Metamaterial Single-Layer (새로운 메타물질 Single-Layer를 이용한 2.4GHz 대역을 위한 고 이득 메타물질 패치 안테나)

  • Park, Kwan-Young;Yang, Seung-In
    • Journal of the Institute of Electronics and Information Engineers
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    • v.50 no.6
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    • pp.56-61
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    • 2013
  • In this paper, a high gain patch antenna using a single layer metamaterial superstrate with a near-to-zero refractive index (n) is proposed. Simulations for an ordinary patch antenna and our proposed metamaterial patch antenna were conducted. Our proposed metamaterial patch antenna was implemented and measured. The gain of our proposed metamaterial patch antenna is 6.77dB higher than that of an ordinary patch antenna.

A Study on Patch Design Technique for Fatigue Life Prolongation of Cracked Structures (균열진 구조물의 피로수명 연장을 위한 Patch 설계기법에 관한 연구)

  • M.S. Han
    • Journal of the Society of Naval Architects of Korea
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    • v.29 no.2
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    • pp.79-91
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    • 1992
  • This paper develops the compliance approach to the problem of load sharing between a cracked plate and a patch used to bridge the crack. The theory is validated by using calculated stress intensity factors for the patched and unpatched case to reduce experimentally observed growth rates to common base, Calculations are then made on the effect of patch dimension on fatique life technique. The optimum design of the patch considered the life expectancy and fracture strength of the cracked structure can be performed simply by using this technique.

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