Proximitycoupled feed two dielectric substrates are used such that the feed line is between the two substrates andthe radiating patch is on top of the upper substrate. 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. Us6373446b2 narrowband, symmetric, crossed, circularly. It can be used to implement required distributedelement rf components such as filters, while at the same time being economical because the same mass production methods are used as for printed circuit boards. The design of meander line elements of the meander line antenna is shown in fig. The measured impedance bandwidth of the antenna for the returnloss less than 10 db in the 2. Microstrip antenna has various applications because it have various advantages as to conventional antenna. The antenna is fed from an intermediate point a distance from the grounded end.
Design and analysis of a folded meander dipole antenna using the mininec program pedro a. The dualband characteristics are obtained by the use of a meander line and a tapered rectangle patch. In our case, for the purpose of reducing the size of transponder, a meander line antenna mla is an attractive choice. The properties of the antenna such as bandwidth, beamwidth, gain, directivity, return loss and polarization were obtained. Increasing the bandwidth of microstrip patch antenna by. A modified meander line microstrip patch antenna with enhanced.
The naval undersea warfare center division newport nuwcdivnpt has developed and tested a microstrip patch antenna that increased the bandwidth of the prototyped gps antenna from a typical 25% to 2025%. A bandwidthenhanced, compact, singlefeed, lowprofile. The gain of the antenna is efficient for meander line antenna to operate well at 2. Apr 30, 2018 meander line antenna, meander line antenna theory, meander line antenna wiki, meander line antenna design equations, meander line antenna meander line antenna basics. Size reduction and bandwidth enhancement of aperture. The directivity of a patch can be estimated quite easily. The proposed mpsa was designed by etching the mls along the radiating edge of the patch antenna, and it enhanced the relative permittivity sensitivity with an additional effect of miniaturization in the patch size by. This paper presents a simple dualband antenna for wireless local area networks wlans applications. Meander line loaded tunable patch antenna us6677915b1 en 20010212.
The upper band is given by the tapered rectangle patch that is connected to a 50 ohm microstrip feed line, while the lower band is produced by means of a meander line that is integrated with the partial ground plane. An invertedf antenna is a type of antenna used in wireless communication. Bandwidth enhancement for low frequency meander line. It consists of a monopole antenna running parallel to a ground plane and grounded at one end. Pdf design and analysis of a meander line cornered microstrip. Two pairs of triangleshaped elements are each connected at their vertices to form bowtie elements. The design has two advantages over a simple monopole.
By inserting the meander line resonator between the patch antennas with the edgetoedge distance less than 18, about 8db reduction of mutual coupling throughout the 10db bandwidth has been achieved without degrading the radiation pattern. The antenna has three doublering resonators drrs etched on the metal patch, and a partial ground plane so that the impedance matching characteristics of the antenna are much better. A bandwidth enhancement of more than 11% was achieved. Some of the recent literature proposing the meandered line fed which is a type of microstrip line fed patch antenna has received potential interest among the researchers in antenna design since this technique is less cumbersome in widening the bandwidth of patch antenna.
Pdf a modified meander line microstrip patch antenna. In the first configuration, one ml is inserted in the slot of the ground and a. Efficiency of a meander line antenna depends on the number. Dual band meander line antenna for wireless lan communication.
The meander line antenna was proposed by rasheed and tai for reducing the resonant length4. As shown in the schema below, high bandwidth cannot be reached with both small surface and small volume. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. Meanderline slotloaded highsensitivity microstrip patch. This shift is due to fringing fields around the antenna. The key to this innovation is the use of a highly anisotropic superstrate layer that can be placed over an existing patch antenna as a retrofit or incorporated into new systems. Design and analysis of a folded meander dipole antenna. Pdf a modified meander line microstrip patch antenna with. The microstrip patch antenna calculator determines the length l and width w of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. Mutual coupling reduction between patch antennas using.
Meander line loaded tunable patch antenna wo2002060007a1 en 20010125. Secondly, the microstrip antenna was designed to operate at 100 mhz, but it is resonant at approximately 96 mhz. Shielded spiral sheet antenna structure and method. Dgs is incorporated in the ground plane under the patch antenna to improve its. Increasing the bandwidth of microstrip patch antenna by loading compact artificial magnetodielectrics abstract. 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. Design of meander slotted patch antenna for wireless. Circular shaped fractal pifa antenna provides high efficiency and gain 7. Size reduction and bandwidth enhancement of aperture coupled. Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e.
In this paper, a development of aperture coupled based microstrip antenna using meander line slot is presented. In our case, for the purpose of reducing the size of transponder, a meanderline antenna mla is an attractive choice. A highsensitivity microstrip patch sensor antenna mpsa loaded with a meanderline slot mls is proposed for the measurement of relative permittivity. This inductance is important because electrically small antennas can have a signi. Design and analysis of meander microstrip antenna at wireless. Bandwidth improvement for compact microstrip patch. A bandwidthenhanced, compact, singlefeed, lowprofile, multilayered, circularly polarized cp patch antenna is presented. Pdf design and simulation of meander line antenna for lte. Improving bandwidth rectangular patch antenna using. The meanderline antenna concept is to fold the conductors back and forth to reduce antenna physical size. Design and analysis of a meander line cornered microstrip patch. The bandwidth enhancement technique which is studied is the identical dual patch microstrip antenna with airgap idma.
The main advantage of this feed technique is that it eliminates spurious feed radiation andprovides very high bandwidth due to overall increase in the thickness of the. Design and analysis of meander microstrip antenna at. Low bandwidth of the classic meander line antennas is a problem 3, as the classic meander line antenna is one of the mi. Microstrip patch sensor antenna for relative permittivity. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Meander lines mls in two configurations are presented to reduce the mutual coupling mc between two microstrip patch antenna elements. Often, the desired bandwidth is one of the determining parameters used to decide upon an antenna. Cavity embedded meander line loaded antenna and method and apparatus for limiting vswr us20050200549a1 en 20040315. Bandwidth improvement for compact microstrip patch antenna.
A simple dualband antenna using a meander line and a. A cornertruncated patch is introduced as a nearfield resonant parasitic element directly beneath a specially engineered radiation patch. Some of the recent literature proposing the meanderedlinefed which is a type of microstriplinefed patch antenna has received potential interest among the researchers in antenna design since this technique is less cumbersome in widening the bandwidth of patch antenna. Section i provides the overview of microstrip meander line reconfigurable antenna. The proposed mpsa was designed by etching the mls along the radiating edge of the patch antenna, and it enhanced the relative permittivity sensitivity with an additional effect of miniaturization in the patch size by increasing the slot length. In this case, the length of meander lines is changed. A simple dualband antenna using a meander line and a tapered. The microstrip line fed patch antennas ensure several stunning properties. But the biggest disadvantages is that they are narrow band antennas. Consider the microstrip antenna shown in figure 1, fed by a microstrip transmission line. The basics of patch antennas, updated orban microwave. Compared to the reference antenna design, using a meander line slot loaded to the antenna patch, it can achieves several performance improvements.
The related artificial magnetodielectric medium belongs to the waveguided metamaterial proposed previously. The resonant frequency of the conventional meander line antenna can be achieved by. If the ratio lw is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. Mutual coupling reduction between closely placed microstrip. The antenna characteristics before and after applying a meander line slot are numerically investigated. For instance, many antenna types have very narrow bandwidths and cannot be used for wideband operation.
Bandwidth enhancement of a dual band planar monopole. Bandwidth enhancement for low frequency meander line antenna. The bowtie elements are arranged orthogonally adjacent a ground plane, reducing shadowing and crosscoupling, and providing an efficient and compact meander lines antenna. In the first configuration, one ml is inserted in the slot of the. The patch antenna, microstrip transmission line and ground plane are made of high conductivity metal typically copper. Here, a meander line resonator is placed in between the radiating elements.
The upper band is given by the tapered rectangle patch that is connected to a 50 ohm microstrip feed line, while the lower band is produced by means of a. Although the line techniques can successfully rewx duce the transverse size of the antenna, the longitudinal size is still large. A patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. The patch is of length l, width w, and sitting on top of a substrate some dielectric circuit board of thickness h with permittivity.
This paper proposes an electrically two type of smallsize antenna that is based on the meander antenna structure that. The operation of classic meander line is changed by two p i n diodes which helps antenna to resonate at different frequencies. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. A bandwidth enhanced, compact, singlefeed, lowprofile, multilayered, circularly polarized cp patch antenna is presented. One standard meanderline antenna and other two nonstandard meander antennas have been. The initial length of meander line is 9 mm and it reduced to 8 mm or 7 mm.
Section ii describes how the concept of classic meander line is formed. Cavity embedded meander line loaded antenna and method and apparatus for limiting vswr us20070115199a1 en 20031231. A more compact design of a meander line antenna was designed to operate at 2. Meander line antenna is the most usage of antenna that use in design of the applications such as rfid and wlan. The microstrip antenna have various advantages like low cost, can be mounted on planar surface,light weight,support dual and triple band of frequency etc. Antennas using patches as constitutive elements in an array are also possible. The most common type of microstrip antenna is the patch antenna. A triangular patch antenna for uhf band with microstrip. Meandering the patch increases the patch over which the surface current flows. This work is brought to you for free and open access by the university graduate school at fiu digital commons. Vertical meandering approach for antenna size reduction.
The 3d view for gain of meander line antenna is also shown in fig. A microstrip meander line reconfigurable antenna for wireless. Meandering the excited patch surface current paths in the microstrip antennas radiating patch is also an effective method for achieving a lowered fundamental resonant frequency for the microstrip antenna 37. Capacitive stripeloaded meander line antenna it is indicated from fig. In order to compare the different types of antennas, the physical dimensions of the antenna can be confronted to the bandwidth achieved. The meander line antenna concept is to fold the conductors back and forth to reduce antenna physical size. Design of meander line antenna for operating frequency of 2. A highsensitivity microstrip patch sensor antenna mpsa loaded with a meander line slot mls is proposed for the measurement of relative permittivity. Slot meander patch antennas are designed for fourthgeneration longterm evolution 4g lte. These improvements are not only in terms of size reduction, but also in terms of.
It is not easy to obtain a good impedance by selecting the position of the shorting posts. Several techniques have been proposed in the literature for widening the bandwidth. Meander line antenna is a type of the microstrip antennas. Typical half wave patches have efficiencies well above 90%. Both simulation and measurement results show that the proposed patch antenna with the eml array. What i will also like to know is how skycross seem to be able to use this design technique to control the radiation patterns and obtain a broadbanddualabnd antenna with acceptable gain. Dec 04, 2012 introduction in its most basic form, a microstrip patch antenna consists of a radiating patch on oneside of a dielectric substrate which has a ground plane on the other side for good antenna performance, a thick dielectric substrate having a low dielectric constant isdesirable since this provides better efficiency, larger bandwidth and better. Rectangular patch antennas are notoriously narrowband. By changing the length of meander line the reduction in length of meander lines effect the antenna performances in terms of frequencies and reflection coefficient. Meander line antenna with artificial magnetic conductor. A similar approach can be applied to design a meandertype slot antenna. Nearzero metamaterial inspired uhf antenna for nanosatellite.
The proposed antenna constitutes of 2 substrate layers which are separated by a common ground plane. But the biggest disadvantages is that it has very narrow bandwidth and low gain. We realize artificial magnetodielectric loading for microstrip patch antenna by etching embedded meanderline eml array in the ground plane under the patch. The radiation pattern of the meander line antenna was shown in fig. Operational bandwidth is measured as the frequency range over which the. Bandwidth enhancement of a dual band planar monopole antenna. Meander line slot is loaded to the antenna patch to reduce the dimension of the proposed antenna design. Previous studies have addressed the design classic meander line 2.
The objective of paper is to design a meander line antenna for wlan application that is 2. By make variations in patch dimensions the operating frequency is. A planar invertedf antenna pifa is used for wireless circuitry implemented in microstrip. Design and comparative study of meander antenna and microstrip. Design, fabrication, and characterization of a dual. Hi all, i will like to know the basics of designing a meander line antenna. The percentage bandwidth of the rectangular patch microstrip antenna in terms of patch dimensions and substrates parameters is given as follows. Both simulation and measurement results show that the proposed patch antenna with the eml array has wider impedance. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. The microstrip format is the format of choice for modern rf electronics. Design and analysis of a folded meander dipole antenna using. Photograph of the meander line antenna with the coupled patch. A microstrip meander line reconfigurable antenna for.
Meander line antenna mla is the most usage of antenna that use in lte. A meander line slot is loaded to the antenna patch to reduce the dimension of the proposed antenna design. Bae systems information and electronic systems integration inc. A modified meander line microstrip patch antenna with enhanced bandwidth for 2. Design of meander line antenna for operating frequency of. Soh designed a planer meander line antenna to operate in a frequency of. The present invention features an improved crosselement meander line loaded antenna. On the other hand, meandered antennas are very hard to.
What is meander line antenna meander line patch antenna. The 10 db impedance bandwidth of the proposed antenna is 2. Experimental results and validation todetermine if thedesign in fig. However, there still is a need for a meanderline antenna that can provide wider frequency bandwidth for 5. Proper design of the superstrate layer and the correct orientation of its polarization layer enable broader bandwidth capabilities for a given antenna.
However, there still is a need for a meander line antenna that can provide wider frequency bandwidth for 5. The microstriplinefed patch antennas ensure several stunning properties. Inserting a slot in the ground plane between the antenna elements is a simple method to reduce the mc, while adding the mls in the slot of the ground can further reduce the mc. Pdf design and simulation of meander line antenna for. Click here to go to our page on circular patch antennas new for september 2018. Mar 05, 2017 the microstrip antenna have various advantages like low cost, can be mounted on planar surface,light weight,support dual and triple band of frequency etc. According to the second meanderline simulation, the dimension of the antenna is 75mm 39mm 1. We realize artificial magnetodielectric loading for microstrip patch antenna by etching embedded meander line eml array in the ground plane under the patch.
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