The methods developed for efficient wideband patch antenna design are based on one or more of the following principles. The thickness of the ground plane or of the microstrip is not critically important. One effective way to increase the impedance bandwidth is to change the patch shape, feed shape and the slot shape. Furthermore, the effect of slot on ground plane is analyzed which improves the antenna bandwidth and performance as discussed in 6, 7, 8. Design of slotted ground hexagonal microstrip patch. Ushaped slot is cut on the lower patch as it provides improved. A compact rectangular microstrip antenna is realized by embedding slots on the ground plane with increased impedance bandwidth and gain. Aperture coupled microstrip antenna design and analysis. This study presents a new, simple method for reducing the backlobe radiation of a microstrip antenna msa by a par tially removed ground plane of the antenna. It is based on coupling of an aperture between the patch antenna and microstrip slot line.
This paper presents effect of slots on microstrip patch antenna and its parameters. With the help of slots, the size of microstrip patch antenna has been reduced. This antenna is often built of printed circuit board material and the substrate makes up the. The first aperture coupled microstrip antenna was introduced in 1985 by d m pozar 4 figure1.
A pin diode is placed on every slot to alter the current direction, which determines the. For good antenna performance, a thick dielectric substrate having a low dielectric constant and better radiation. Printed wideslot antenna design with bandwidth and gain. Here the previously designed 8 element array with corporate feed, as shown in figure 6. To study the effect of substrate material for microstrip.
Pdf effects of slot loading on microstrip patch antennas. This type of antenna had its first intense development in the. The effect of ground plane deformation on resonant frequency of air microstrip antennas can be effectively calculated by the mathematical model. Introduction in recent years there is a need for more compact antennas due to rapid decrease in size of personal communication devices. The efficiency of the antenna also improve with low dielectric constant. Design of a meandered line microstrip antenna with a. In this paper the typical configurations of slots are studied by putting group of narrow vertical slots on ground plane parallel to the patch radiating edge. By means of parasitic elements or slots, either new resonances. This paper presents the ground plane slots effectiveness up on the bandwidth performance for the ultrawideband uwb antenna. The basics of patch antennas, updated orban microwave. The patch antenna, microstrip transmission line and ground plane are made of high conductivity metal typically copper. In this paper i enhanced the bandwidth of mpa by inserting multiple slots in its ground plane. It has been observed that by taking out h shape slot from the patch and from the ground plane, there is considerable improvement in the return loss, vswr and input impedance. Metallic objects are challenging for passive ultra high frequency uhf spectrum radio frequency identification rfid systems due to the effects of conductive materials on tag antenna performance.
This paper presents the effect of the slots in ground plane and patch on resonant frequency, impedance bandwidth, gain and side lobe. Thus by reducing the ground plane to partial ground plane, the bandwidth has been doubled in value and there is also an increase in the return loss value. The fundamentals of patch antenna design and performance by gary breed editorial director m icrostrip patch antennas also just called patch antennas are among the most common antenna types in use today, particularly in the popular frequency range of 1 to 6 ghz. Effect and design of microstrip patch antenna with. Sequel reaction of slots in patch and ground plane on microstrip antenna performance. Our reference antenna is monopole feature microstrip feed style with a square radiator and a partial ground plane. Conclusion from the above graphical and numerical results it is clearly understood that the introduction of. Keywords microstrip patch antenna, frequency, gain, beamwidth,hfss,wireless communication. A microstrip line fed slotted antenna with a central parasitic radiator to achieve wideband performance is presented in 32.
We inserted slots in parallel and horizontally to the feeding line. Bandwidth improvement of microstrip patch antenna using. Dgs is popular because of the simple structural design, filtering performance, and controlling radiation properties of microstrip patch antennas by suppressing crosspolarized radiations 19. Effect of slots in ground plane and patch on microstrip. What the effect of size the patch and ground plan on. Analysis of microstrip antenna performance by varying length of. The effect of the partial ground plane removal in different configurations on the radiation characteristics of a msa are investigated numerically. The slots on the patch or on the ground plane will help to. It is a popular printed resonant antenna for narrowband microwave wireless links that require semihemispherical coverage. Increasing microstrip patch antenna bandwidth by inserting. The microstrip antennas have been designed on er 4. However, the radiation characteristics of the antenna degrades when we rise frequency up to the millimeter wave band 5. Hexagonal patch with slot in the ground a single triangular slot is cut in the ground plane. The effect of backslit groundplane to microstrip patch.
Recent researches in circuits, communications and signal processing isbn. Microstrip patch antennas are used in many applications and fields due to its various advantages such as low weight and profile 3, mechanical robustness and fluency of manufacture 4. This antenna is optimized by adjusting the feed position and size of the triangular slot in the ground to have the optimum impedance matching and optimum bandwidth. The results of proposed antenna shows that by using proper slot size on patch s surface the performance of antenna can be improve. Letters international journal of recent trends in engineering, vol 2, no. In this paper a microstrip patch antenna is designed with rectangular ground structure with slit loaded on the ground plane to both enhance the performance and reduce the dimension. Abstractthis paper presents the effect of the slots in ground plane and patch on resonant frequency, impedance bandwidth, gain and side lobe. One of the main disadvantages of mpa which limits its applications is its narrow bandwidth. In this paper, we study the effect on performance characteristics of rectangular patch antenna with varying thickness of dielectric cover. Properties of a basic microstrip patch a microstrip or patch antenna is a lowprofile antenna that has a number of advantages. In this article a broadband microstrip patch antenna is designed with slit incorporated in the rectangular ground plane.
The proposed lowcost, compactsize circular patch antenna on 3 cm 5. This study presents the theoretical and experimental investigation on the effect of rectangular slot on resonance frequency, return loss and band widths of a novel, single layer, single probefed rectangular microstrip patch antenna. I show the resonant performance characteristics of the planar patch antenna, antenna with slot and with dgs structure. The cp waves are excited by two perturbation elements of loop slots in the ground plane. Compact rectangular microstrip antenna with group of slots on. The proposed microstrip antenna consists of a feed structure, a trapezoidal ground plane and a quartercircle shaped radiating patch with grooved slots on it, these structures are printed on a. The effect of backslit groundplane to microstrip patch antenna for 4g mobile phones application. The effect of defective ground structure on the rectangular microstrip patch. Peixeiro 16 reported the effects of ground plane size on a microstrip antenna performance for small handsets.
The conducting patch that acts as radiator, substrate that acts as base material, conducting ground plane and strip line that provide interface between source and antenna. The antenna has been designed for the centre frequency of 3. The main disadvantage of these antennas is their relatively large size compared to other types of antennas. By embedding meandering slots in the antennas ground plane, it is observed that the resonant frequency of the microstrip antenna is significantly lowered, which can lead to a large antenna size.
This paper examines the effect of a finite ground plane on microstrip fed cavitybacked slot antennas. We added up to 15 slots in the ground plane with 3 mm spacing. The other method to miniaturize the microstrip antenna is to modify its geometry using irises 5 or folded structures 6, based on the perturbation effect 7. Effects of slot loading on microstrip patch antennas. On the use of slots in the design of patch antennas.
Effect of slots in ground plane and patch on microstrip antenna. In this case a coaxial cable fed microstrip line is used which leads to good impedance matching and its operating frequency is 2. Performance of the microstrip patch antenna for different ground plane slot dimensions and fixed slot radius of patch vi. Design of a meandered line microstrip antenna with a slotted. An aperturecoupled design is proposed for microstrip slot antenna to improve its radiation pattern as well as bandwidth. Effect and design of microstrip patch antenna with defected ground structure written by sukhamrit pal singh sodhi published on 20200222 download full article with reference data and citations.
The effect of the ground slots up on the bandwidth. Patch antennas come in various shapes and sizes and consist of a patch of metal directly above a ground plane. Microstrip patch antennae radiate primarily because of the fringing fields between the patch edge and the ground plane. Inset fed patch antenna inset fed rectangular microstrip patch antenna is designed using transmission line model 5 at 900mhz, dielectric constant is 2.
Impact of slots on the performance analysis of microstrip. Each slot line is 2 mm shorter than the previous one. Effect of partial ground plane removal on the radiation. The fundamentals of patch antenna design and performance. The overall performance of the antenna is influenced by. Actual environments are different, and the ground plane is necessarily limited. Patch and ground plane design of microstrip antennas by. Effect of ground plane deformation on electrical performance. Effect and design of microstrip patch antenna with defected. Enhanced bandwidth of uwb microstrip antenna using uslot. A microstrip patch antenna mpa consists of a conducting patch of any planar or nonplanar geometry on one side of a dielectric substrate with a ground plane on other side. Double lslot microstrip patch antenna array for wimax and. Our reference antenna is monopole feature microstrip feed style with. The uwb antenna consists of simple rectangular patch antenna with 50.
Performance analysis of a defected groundstructured antenna. For good antenna performance, a thick dielectric substrate having a low dielectric constant ground plane to partial ground plane, the bandwidth has been doubled in value and there is also an increase in the return loss value. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Abstract analysis of resonant behavior of microstrip patch antenna with defective ground structure has been presented in this paper.
The aperture coupled patch antenna microstrip feedline, substrates, ground plane slot, and patch dimensions are varied to determine effects on antenna performance which eliminates the electrical connection between the radiating conductors and feed by employing dielectric substrates separated by a ground plane. A polarization reconfigurable patch antenna with loop. All the patch elements are laminated on the top of the substrate, and the ground plane is on the opposite side of the patch where four rectangular slots are placed as dgs elements. Results show that the tshaped ground plane with the presence of the diagonal cuts at the top corners and the rectangular slots. They also examined effects of small ground plane on bandwidth and gain of pifa. For example, some patch antennas are approximately half a wavelength on each side. But however this arrangement increases the antenna area which will decrease the antenna compactness and efficiency. An ishaped microstrip line is used to excite the square slot. Pdf the effect of the ground slots up on the bandwidth. Bandwidth enhancement of uwb microstrip antenna with a. Microstrip patch antenna mpa is widely implemented in different communication systems. It has been observed as the slot length increases the resonant frequency shifted to the lower side by. Design and performance issues of microstrip antennas vinay bankey, n.
This antenna is often built of printed circuit board material and the substrate makes up the patch antennas dielectric. The proposed msr assimilated antenna comprises planar straight forward design of circular shaped radiator with horizontal slots on it and 2d. The effects of the finite ground plane shape are analyzed by the commercially available ie3d software. The proposed antenna is designed on a rogers rtduriod 6202 with relative permittivity 2. The coplanar waveguide cpw fed microstrip patch antenna considered in our work comprises of two rectangular patch elements each embedded on two lshaped slots. Rectangular slotted ground structure to reduce mutual. This paper presents a microstrip antenna loaded with u slot. Defected ground structure dgs is typically a microstrip line with etched slots on the ground plane. Microstrip patch antenna has a ground plane on the one 1. Broadband microstrip patch antenna using dual u slot with low profile has been proposed and analysis of results has been done by using ie3d simulator. Here rectangular patch and partial ground plane is used. This letter proposes a reconfigurable microstrip patch antenna with polarization states being switched among linear polarization lp, lefthand lh and righthand rh circular polarizations cp. Effect of ground plane shape on microstrip antenna.
The effects of rectangular, square and circular ground plane shapes are reported for a probefed rectangular microstrip patch, where the probe location has been preselected for the best vswr based on cavitymodel formulation. As we know the current distribution on the ground plane of the conventional patch antenna mainly concentrates just under the patch, as shown in figure 3, which is the vector current distribution of the resonant frequency 5. The patch is of length l, width w, and sitting on top of a substrate some dielectric circuit board of thickness h with permittivity. Design and performance issues of microstrip antennas. A microstrip patch antenna is comprised of a radiating metallic patch situated on one side of a nonconducting substrate panel with a metallic ground plane placed on the other side of the panel. In this paper, we show the influence of the dimensions and the shape of the support. Effect of height of the substrate and width of the patch. Broadband microstrip patch antenna using dual uslot with low profile has been proposed and analysis of results has been done by using ie3d simulator. The slots on the patch or on the ground plane will help to design a antenna with improved bandwidth and effeciency. Investigations have been carried to cut steps in the four corners of the rectangular patch and to add slots in the ground plane. Most radiation analyses of microstrip antenna are based on the assumption of an infinite ground plane. In this paper a small size microstrip antenna with slot and defective ground structure have been designed to examine the relationship between the resonant. The results of proposed antenna shows that by using proper slot size on patchs surface the performance of antenna can be improve. Effect of slot size variations on microstrip patch antenna.
Sequel reaction of slots in patch and ground plane on. Metasurface reflector msr loading for high performance. Tech scholar 2assistant professor 1,2department of electronics and communication engineering 1,2madan mohan malaviya university of technology, gorakhpur273010, uttar pradesh, india. Aperture coupled microstrip slot antenna couples the patch antenna with microstripline through an aperture. Analysis of microstrip antenna performance by varying. Slots in the ground plane of rectangular patch we designed microstrip patch antenna with multiple number of slots. The uniform geometrical theory of diffraction is employed for calculating the diffracted fields from the edges of a slot antenna s finite ground plane. In this paper, the effect of the ground plane deformation on electrical performance of air microstrip antennas is approximately processed. Multiband stacked microstrip patch antenna with wide ground. A microstrip antenna can provide all these mentioned features.
The dimensions of this antenna are 59 mm and 79 mm. It has been concluded that when dielectric constant reduces from 4. A microstrip patch or array with infinite ground plane is a theoretical antenna, but patch with finite ground plane is of practical interest. Defect in ground plane helps in increasing capacitance and inductance.
Four different slots configurations triangular, trapezoidal. Pdf effect of slots in ground plane and patch on microstrip. The rectangular microstrip antenna with rectangular defective ground structuredgs is simulated using hfss software. Ground plane provides a larger canvass for introducing modifications for enhanced performance. In this paper the reconfigurable patch and ground plane used as a technique for enhancing band width of microstrip antenna, traditional rectangular patch microstrip antenna is used as a comparison. An introduction of aperture coupled microstrip slot antenna. The objective of this thesis is to analyze the impact of ground plane size and geometry on the performance of microstrip patch antennas applied in wifi technology, aiming to cover the 2,45 ghz and 5,8 ghz frequency bands. The effect is shown on bandwidth, gain, radiation pattern, return loss, axial ratio and size of an antenna. Design and study of compact and wideband microstrip uslot. The effect of simulated return loss, swept gain and radiation pattern of the proposed antenna have been obtained due to variation of slit dimensions. It is found that for the ultralow profile microstrip antenna the slots in the ground plane gives the most wide bandwidth three times the conventional one, while the slits in the patch gives the most reduction in size more than 60% compared to the conventional one. It has been observed as the slot length increases the resonant frequency shifted to the lower side by 19. Effect of a finite ground plane on microstripfed cavity.
Effect of ground plane for enhancing the bandwidth and. Slotted ground plane of rectangular patch microstrip antenna. Effects of metallic plate size on the performance of. Microstrip patch antennas with regular ground plane and. In this paper, we present a double l slot microstrip patch antenna array for worldwide interoperability for microwave access wimax and wireless local area network wlan applications. Slots are introduced in the patch and ground plane. A scheme is devised to reduce the mismatch problem associated with thick substrates. The effect of defective ground structure on the rectangular microstrip patch antenna is observed by varying the length of the rectangular slot and the performance of the antenna in terms of return loss and bandwidth are analyzed. In this letter, we analyze the effects of metallic plate size on the performance of microstrip patch type tag antennas. This paper presents a printed wideslot antenna design and prototyping on available lowcost polymer resin composite material fed by a microstrip line with a rotated square slot for bandwidth enhancement and defected ground structure for gain enhancement. The distance between the patch and the ground plane the.
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