Nakar follow this and additional works at the fsu digital library. Microstrip antenna an overview sciencedirect topics. It is mounted on a small, rectangular, flat surface and consists of two metallic plates placed upon each other. Thus the element and feed line, and usually other elements, power dividers, etc. Unfortunately it did not work with me, no clue why. Basically, a microstrip patch antenna is composed of a trace of copper or any other metal of any geometry on one side of a standard printed circuit board. The patch may be in a variety of shapes, but rectangular and circular are the most common. The radiation pattern of microstrip or patch antenna is broad. A microstrip patch antenna thesis mpa comprises of a leading patch of any planar or nonplanar geometry on one side of a dielectric substrate with a ground plane on opposite side. Also called patch antennas one of the most useful antennas at microwave frequencies f 1 ghz. It is a prominent printed resounding recieving wire for limited band microwave remote connections that require semi hemi round scope.
Parametric studies were conducted to illustrate the working principle of the proposed antenna. The obtained results indicate that a cavitybacked microstrip patch antenna is a feasible solution for broadband digital radio and other satellite. The patch antenna is therefore a voltage radiator, as opposed to the wire antennas, which radiate because the currents add up in phase and are therefore current radiators. Bandwidth enhancement of microstrip patch antenna using. It has low radiation power and narrow frequency bandwidth. Design and analysis of microstrip patch antenna array. Microstrip patch antenna consists of a radiating patch on one side of a dielectric substrate fr4 that has a ground plane cu on the other side as shown in fig. For the current scenario proposed design of 8x1 patch array antenna. The return loss and the various gain plots have been studied along with the radiation patterns. 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 of the substrate which forms a ground plane. The most widely used printedcircuit antenna is the microstrip patch, which in its simplest form is a rectangular or circular patch of metal fed by the microstrip upper conductor. Advantages and disadvantages of microstrip patch antenna. In this book, some recent advances in microstrip antennas are presented. The earliest and most common microstrip antenna is the rectangular printed patch.
And if you design a patch antenna to resonate at 10 ghz then it will work for sure. The primary mode is a resonance along l, but by forcing w to be 14 l, if any mode is excited in the w direction it is harmonically related and it doesnt hurt your ears. But illustrates sizes and importance of good antenna design why microstrip antennas. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. Microstrip patch antenna design santa clara university. A patch antenna is a lowprofile directional radio antenna that is used for indoor locations covering singlefloor offices, stores and small studios. Why microstrip patch antenna does not work above 10ghz. Microstrip patch antenna is generally used in modern communication devices. They have lower fabrication cost and hence they can be. As per microstrip patch antenna offer low profile, low cost and low volume. These are very low size antennas having low radiation. Objectivesthe objective of this project is as follows. How does an microstrip patch antenna radiates answers.
Q represents the losses associated with the antenna and a large q leads to narrow bandwidthand low efficiency. Most often, microstrip antennas are made by etching the patch from a printed circuit board with conductor on both sides. Each element of the array is rectangular in shaped. Review of broadband techniques for microstrip patch antenna. An additional resonance is introduced by the crr to broaden the bandwidth. Patch antennas are mechanically rugged and can be shaped to conform to the curving skin of a vehicle. In this case, each vector starts at the origin and lies along the specified points on the x, y, and zaxes.
The main reason for the high q factor is that patch antennas are essentially circuits printed on a relatively thin substrate. The top metallic flat region, which is called the patch antenna, sits on a dielectric substrate. If there is time and if available a build and testing of a patch antenna design will be carried out. This is a gui for calculating the design parameters and plotting the radiation characteristics of a rectangular patch antenna. By using complementary rhombus resonator crr, a smallsize and lowprofile microstrip patch antenna mpa with broad bandwidth has been proposed. Because for satellite communication as well as radar applications patch antennas are used.
Create microstrip patch antenna matlab mathworks india. Furthermore, in the last few years, such microstrip antennas found numerous applications in both the military and the commercial sectors. Rectangular patch antennas are notoriously narrowband. Trends in research on microstrip antennas intechopen. Like the microstrip antenna, the width of the keys are significantly less than their length.
Pdf improving the performance of microstrippatch antennas. The design and simulation of patch antennas is widely used in mobile cellular phones today, and our emphasis in this work is on optimization of a 2. Common patch antenna shapes are square, rectangular, circular and elliptical. Design of a rectangular microstrip patch antenna using. A metal patch mounted on a ground level with a dielectric material inbetween constitutes a microstrip or patch antenna. New types of microstrip antennas for uhf applications. The basics of patch antennas, updated orban microwave. P, india abstract here we made an attempt to maximize the gain of microstrip patch antenna. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Phd mtech thesis on umb or microstrip patch antenna. The results obtain that microstrip patch antenna can be used as client antenna in computer and workable antenna for wireless fidelity. The patch antenna is a good place to start for antenna fundamentals with more coming. Analysis and design of circular microstrip patch antenna at 5.
Common microstrip antenna shapes are square, rectangular, circular and elliptical, but. Secondly, the microstrip antenna was designed to operate at 100 mhz, but it is resonant at approximately 96 mhz. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. In its most basic form, a microstrip patch antenna consists of a radiating patch on one side of a dielectric substrate and a ground plane on the other side. Flat surface makes them ideal for mounting on airplane impedance matching fairly simple microstrip patch antennas have a very high antenna quality factorq. Study of past few year shows that, most of work on mpa is focused on designing compact sized microstrip antenna. The antenna works as an interface between transmission lines and free space. Properties of a basic microstrip patch a microstrip or patch antenna is a lowprofile antenna that has a number of advantages over other antennas. It also has a wide angle of beam in its radiation pattern.
Antenna feeding technique can generally divide into two categories which are contacting and noncontacting. Compared with the mpa without the crr, the bandwidth of the proposed antenna. This is effectively a wide piece of microstrip transmission line approximately. Design of a compact microstrip patch antenna for use in wirelesscellular devices punit s. A stealth aircraft has about 5070 microstrip antennas. For excellent antenna performance, a thick dielectric substrate having a low dielectric constant is needed because this provides better efficiency, larger bandwidth and. It usually consists of a metal patch on top of a grounded dielectric substrate.
Though this works well, the splitter and delay line take up valuable board space. This rectangular microstrip patch antenna is designed for wireless communication application that works at 2. Microstrip antennae are very simple in construction using a conventional microstrip fabrication technique. Patch antenna calculator file exchange matlab central.
Figure 4 from rectangular microstrip patch antenna for 2. Therefore, microstrip patch antenna has become a major focus to the researchers in the field of antenna engineering. Patch antennas can be designed from the uhf band to as high as 100 ghz. Threeelement vectors of cartesian coordinates in meters. Fr4 and rogers3006 material with dielectric constant 4. The resonant frequency of a rectangular microstrip patch antenna is given by. The microstrip antennas radiation arises from the fringing fields, which are due to the advantageous voltage distribution. Polarization analysis for an xband microstrip patch antenna. The radiation at the edges causes the antenna to act slightly larger electrically than its physical dimensions, so in order for the antenna to be resonant, a length of microstrip transmission line slightly shorter than onehalf the wavelength at the frequency is used. One plate is larger than the other, which is called ground plane and. To understand the basics behind antenna theory and microstrip patch antennas. Gui to calculate parameters and plot patterns of microstrip patch.
469 1252 648 683 729 426 1112 1422 610 1065 872 942 724 387 1403 1256 674 358 1235 3 606 1420 155 105 554 848 891 579 741 628 52 1183