Investigation of the characteristics of barium strontium. A dielectric loaded microstrip patch antenna is provided for delivering relatively wide operational bandwidth dualband, with relatively good isolation and flexibility for circular polarization. Effect of the effective dielectric constant on the radiation characteristics of a microstrip patch antenna eunhyuk kwak, youngmin yoon, and boogyoun kim school of electronic engineering, soongsil university 511 sangdodong, dongjakgu, seoul 156743, korea tel. The overall performance is degraded by slightly after the use of superstrate. Slotloaded microstrip patch sensor antenna for high.
An hplane sectoral horn antenna is loaded with lowloss dielectric insertsn alternative embodiments so as to reduce beamwidth, increase axial gain and to achieve nonmechanical beam scanning. As the antenna is loaded with a dielectric as its substrate, the length of the antenna decreases as the relative dielectric constant of the substrate increases. Compact dielectric loaded patch antennas for lband mobile satellite applications by sara m. Experimentalresults demonstrate that the proposed antenna has obtained a wide impedance bandwidth of 57. Compact dielectricloaded patch antennas for lband mobile. Microstrip antenna an overview sciencedirect topics. Patch antenna category is a curation of 10 web resources on, patch antenna for apt, the basics of patch antennas, patch antenna. It consists of a dielectric resonator surrounded by a rectangular patch ring acting as a loading element which produces a widen. A glucose sensing system based on transmission measurements. Lens antennas are typical examples that can be used alone, or in conjunction with other antennas, such as horn and microstrip antennas, to enhance their gain. The proposed antenna structure has been studied with single and double dielectric loadings, basically to provide necessary protection to patch antenna from environmental hazards. By loading two printed patches to the dielectric resonator antenna dra, a compact wideband hybrid dielectric resonator antenna with enhanced gain and low crosspolarization is presented. Compact doublep slotted insetfed microstrip patch antenna.
Rectangular microstrip patch antennas have been designed as the basic element for the sensor, with a rogers 5880 substrate material of 254. The microstrip patch antenna has a conducting ground plane and a patch radiator. Two resonant frequencies were created at a lower frequency compared to the single resonant frequency of a conventional ordinary patch. The effective dielectric constant of the superstrateloaded microstrip antenna was calculated by using the filling factors of the substrate and superstrate. Us6281845b1 dielectric loaded microstrip patch antenna. Abstract the study of microstrip patch antennas has made great progress in recent years. The radiator is a compact sequentially rotated patch array loaded with a magnetodielectric md layer to achieve miniaturization for ease of integration with solar panels. In this work, a novel dielectricloaded patch antenna is presented as a technique to miniaturize a microstnp antenna while maintaining a fairly wide impedance. Electronics free fulltext slotloaded microstrip patch.
What dielectric constant defines the half wavelength. Mcv offers patch antennas in various sizes for gps and wlan applications. Silicone rubber superstrate loaded patch antenna design using slotting technique to cite this article. The bst dielectric resonators loaded on the microstrip patch have resulted in resonance frequencies of 2. It is shown that practically realizable substrates with dispersive magnetic permeability are not advantageous in antenna.
Loading effect of dielectric resonator on small patch antennas. It consists of an aperturecoupled microstrip patch suspended above a ground plane and loaded with high permittivity dielectric pieces. The radiator is a compact sequentially rotated patch array loaded with a magneto dielectric md layer to achieve miniaturization for ease of integration with solar panels. Suspended microstrip patch antenna with dielectric resonator. In this paper we present a novel solar panel integrated navigation antenna for solar powered vehicles and devices. Dielectric loaded antennas request pdf researchgate. In this paper, characteristics of electromagnetically coupled em dielectric loaded rectangular patch have been analyzed using hfss. Effect of the effective dielectric constant on the radiation. In telecommunication, a microstrip antenna usually means an antenna fabricated using. Although the foregoing is broadly applicable to all aperture antennas, the present invention is primarily concerned with improved designs of hplane sectoral horn antennas loaded either with arrays of dielectric slabs in the transverse direction i. In applications such as highgain antennas, they influence. Dielectric today offers a full complement of radio products, and the most complete line of television antenna products of any manufacturer in the world.
Dielectric antennas mcv microwave dielectric antennas are compact size, high performance, reliable, rohs compliant and cost competitive. What separates us from any other manufacturer is the precise engineering of each product to ensure the clearest transmission from your specific installation. The basics of patch antennas, updated orban microwave. When a high permittivity dielectric resonator of suitable resonant frequency was loaded over the patch, the % bandwidth of the antenna was increased by more. Novel dual band microstrip circular patch antennas loaded. Compact dielectricloaded patch antennas bibliotheque et. Then, for the precise computation of the radiation area of the aforementioned dr the size of a square aperture. Enhanced bandwidth microstrip patch antennas loaded with high. Dielectricloaded conformal microstrip antennas for versatile in.
At first, the abovestated characteristics of a patch antenna loaded with conventional plastic substrate have been investigated. A microstrip radiator antenna consists of conducting patch on a ground plane, which is separated by a dielectric. Us4447811a dielectric loaded horn antennas having improved. Dielectric and dielectricloaded antennas published in. Wideband doublelayered dielectricloaded dualpolarized. Figure 16 shows a microstrip antenna or patch antenna for a global positioning system gps receiver, using a high k dielectric substrate. A thesis submitted to the faculty of gnduate studies and research in partial fulfillment of the requirements for the degree of master of engineering in electronics ottawacarleton institute for electncal and computer engineering department of electronics. A miniature dielectric resonator loaded patch antenna. Dielectric loading 514 is one possibility for bandwidth enhancement. Pdf a dielectric resonator loaded patch antenna excited by a coaxial cable is proposed in this paper. Pdf a high gain dielectric resonator loaded patch antenna. Investigation of the characteristics of barium strontium titanate bst dielectric resonator ceramic loaded on array antennas.
Novel design of a dual band microstrip circular patch antenna loaded with eng. The future of television transmission technology requires higher data rates and more channel capacity. A dielectric loaded microstrip patch antenna is provided for delivering relatively wide operational bandwidth dualband, with relatively good isolation and flexibility for circular polarization, while having a compact design and lightweight to suit mobile and wireless applications. For all the antennas, the optimum position that gave the maximum return loss bandwidth.
A slot loaded microstrip patch sensor antenna is proposed to enhance sensitivity in measuring the permittivity of planar materials. Dielectric waveguide antennas are used in some compact portable wireless devices, and military millimeterwave radar equipment. A compact wideband hybrid dielectric resonator antenna. The proposed antenna utilizes a combination of a rectangular dielectric resonator and two printed patches. Unlike most traditional small antennas, the proposed design has a relatively low crosspolarization, less than 20 db. In one embodiment, the antenna is transversely loaded with a multilayer dielectric array containing an air gap of critical thickness between four dielectric strips. Lowcost dielectric substrate for designing low profile. A thin rectangular slot was etched along the radiating edge of a rectangular patch antenna fed by a microstrip transmission line. Performance evaluation of rectangular microstrip patch. The radiation characteristics of a microstrip patch antenna versus the grounded dielectric substrate size are mainly determined by the effective dielectric constant of a grounded dielectric substrate. Dielectric is designing antennas that are capable of raising signal strength over a. In general, the antenna performance and its dimension are essentially interlinked together. A patch loaded dielectric resonator antenna request pdf. In particular microstrip antenna designed on duriod substrate for f 4.
Antennas using patches as constitutive elements in an array are also possible. A patch antenna is a narrowband, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate, such as a printed circuit board, with a continuous metal layer bonded to the opposite side. A new method and prototype system for measuring the relative permittivity and loss tangent of dielectric materials has been developed by using a. Excellent agreement between the simulation and experimental results shows that the. A patch antenna supported by a dielectric resonator is studied. Dielectric and dielectricloaded antennas ieee journals. In this paper, the resonance and radiation characteristics of patch antennas fabricated with two different types of dielectric substrates have been investigated and compared at gsm 1800 mhz band. A dielectric resonator antenna dra is a radio antenna mostly used at microwave frequencies and higher, that consists of a block of ceramic material of various shapes, the dielectric resonator, mounted on a metal surface, a ground plane. Compared with conventional antennas, microstrip patch antennas have more advantages and better prospects. The antenna was first proposed by robert richtmyer in 1939. A thicker substrate increases the gain to some extent, but may lead to undesired effects. Several research works have been reported on fractal patch antennas and the microstrip patch antenna, but not much. The proposed antenna has been designed and fabricated on ceramicptfe composite material substrate of high dielectric constant value.
Miniaturization of microstrip patch antennas for gps applications. Microstrip antenna array with a beam focused in the nearfield zone for application in noncontact microwave industrial inspection. Holland university of massachusetts amherst follow this and additional works at. Dielectricloaded conformal microstrip antennas for versatile inbody applications. Jul 31, 2017 rectangular microstrip patch antennas have been designed as the basic element for the sensor, with a rogers 5880 substrate material of 254. The most common type of microstrip antenna is the patch antenna.
Gain enhancement of antennas loaded by an infinite or a finite dielectric layer have been studied analytically and experimentally. Related content microwave dielectric properties of 0. A thesis submitted to the faculty of gnduate studies and research in partial fulfillment of the requirements for the degree of master of engineering in electronics ottawacarleton institute for electncal and computer engineering. A microstrip radiator antenna consists of conducting patch on a ground plane, which is separated by a. In this work, a novel dielectricloaded patch antenna is presented as a technique to miniaturize a microstnp antenna while maintaining a fairly wide impedance bandwidth. The image below shows two ways to feed the microstrip patch, on the left is a microstrip feed and on the right is a coax feed. The geometrical structure and configuration with detailed design parameters of the proposed patch antenna are shown in figure 1. The characteristics of electromagnetically coupled two layered dielectric loaded patch antenna. The impedance bandwidths of miniaturized size patch antennas loaded with dispersive magnetodielectric substrates and highpermittivity substrates are compared. Printed microstrip patch antennas are competitive solutions for their inherent advantages of lowcost, lowprofile, lightweight, less troublesome fabrication, and ease of integration to the system 1, 2. Next year, a multilayer miniature patch antenna was proposed. Paper open access related content silicone rubber superstrate. Rectangular patch antenna keeping the suspended microstrip parameters d, r, and a. Patch antenna, dielectric antennas, dielectric antennae mcv.
In some papers, dielectric loaded wire monopole antennas are called hybrid antennas because they consist of two di. On the contrary, figure 14 shows an antenna without bst dielectric resonators, which results in large current distributions occurring on the surface at a frequency of 2. Miniaturization of microstrip patch antennas for gps. Dielectric ceramic loaded stripline antennas have several advantages, namely small size, fairly narrow but still wide enough frequency band, and good temperature stability.
Dielectric loading on multiband behaviors of pentagonal. The distance between the patch and the ground plane the. The field components of the small dipole can be obtn,ined from a scalar solution of the wave equation sommerfeld, 1949. For liquid materials, the microstrip patch is considered to be buried in the liquid mut, and an effective dielectric constant was derived by using that in the buried microstrip structure.
This article reports the feasibility study of miniaturizing probefed microstrip patch antennas by dielectric loading. Simulated reection coecient of loaded antennas first, we investigate inuence on antennas performances when loading cylinder is made of lossy and lossless dielectrics. The application of an airspaced coaxialfed rectangular microstrip patch antenna as a sensor was. The regions between the vertical shorted patches are loaded by dielectric materials to reduce the antenna pro. The measured radiation patterns are stable across the operating frequency range. Analysis of five different dielectric substrates on. A slotloaded microstrip patch sensor antenna is proposed to enhance sensitivity in measuring the permittivity of planar materials. Due to the hybrid design, multiple resonances were obtained. The basic geometry of a dielectric loaded rectangular microstrip antenna is shown in figure 2. Wait 1952 has applied this technique to a similar geometry involving a magnetic dipole. Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e. Using eng metamaterial instead of the conventional dielectric, unconventional tm. It consists of a dielectric resonator surrounded by a rectangular patch ring acting as a loading element which produces a widen beamwidth in the antenna patterns. Dielectric media affect the wave propagation by their reflective index.
Sachin saxena2 1research scholar, sunrise university, alwar, rajasthan 2supervisor, sunrise university, alwar, rajasthan abstract. Triplatetype dielectric loaded patch antenna abstract. The dielectric constant that controls the resonance of the antenna is the. This paper presents a new eshaped slot loaded patch antenna that is investigating for enhancing the impedance bandwidth. In addition, the antenna is backed with a rectangular cavityshapedre. The antenna is designed and simulated using cst studio suite. Dielectrics engineers used high power design techniques to make this product line extremely durable and troublefree. A compact wideband hybrid dielectric resonator antenna with. Review on dielectrics loaded microstrip antennas dasari kiran kumar1, dr. Analysis of five different dielectric substrates on microstrip patch antenna. For this purpose the device ie3d simulator, one side of a dielectric substrate.
Suspended microstrip patch antenna with dielectric. Their use in antennas can provide a number of diverse benefits. This antenna is often built of printed circuit board material and the substrate makes up the patch antennas dielectric. Compact dielectricloaded patch antennas for lband mobile satellite applications by sara m. Slit loaded h shaped microstrip patch antenna for 2. Radio waves are introduced into the inside of the resonator material from the transmitter circuit and bounce back and forth between the resonator walls. This paper presents a compact sized insetfed rectangular microstrip patch antenna embedded with doublep slots. A microstrip antenna array formed by microstrip line fed toothlikeslot patches. The purpose of this paper is to show the effect of soil which is used as a loaded material on microstrip patch antenna operated at 1. Several research works have been reported on fractal patch antennas and.
Effect of the effective dielectric constant on the. Figure 4 displays the simulated reection coecients of loaded antennas in case of lossy and lossless dielectric. Miniaturization of microstrip patch antennas for gps applications steven s. Some patch antennas do not use a dielectric substrate and instead are made. The projection area of two layered patch antenna is kept same as single layered.
Apr 26, 2017 by loading two printed patches to the dielectric resonator antenna dra, a compact wideband hybrid dielectric resonator antenna with enhanced gain and low crosspolarization is presented. The effect of the different dielectric constants of the. A prototype antenna is designed and a 120deg 3db beamwidth is demonstrated. A patch loaded dielectric resonator antenna dra is presented. Mcv offers patch antennas in various sizes for gps applications. The distance between the patch and the ground plane the substrate or dielectric height h determines the bandwidth.
This small antenna possesses the advantages offered by the folded patch antenna and the dielectric resonator antenna. On the basis of the wellestablished mathematical formulation, the initial. The relative permittivity of the dielectric material is 4. The planar array antenna for dbs, whose each element antenna consists of a microstrip patch loaded by the finite dielectric with low permittivity, was already reported but it had a little radiation loss from the feeding microstrip lines. Further to improve the performance of superstrate loaded antenna, patch slots and ground defects have been proposed. Later a high permittivity dielectric material barium titanate has.