The simulated results of the proposed model of antenna prove that the use of electromagnetic coupling enhances the value of reflection. Omnidirectional multiband stacked microstrip patch antenna with. Multiband stacked microstrip patch antenna with wide ground slot for wireless communications ankita. Such design suffers from narrow bandwidths and low gain 68. Microstrip antennas are relatively inexpensive to manufacture and design because of the simple 2dimensional physical geometry. A reconfigurable stacked microstrip patch antenna for satellite and. Us4070676a multiple resonance radio frequency microstrip. Mimo system consists of multiple number of antennas at transmitter and receiver which in turn offers high capacity to wireless system over a siso system. The cp radiation in dualbands is a result of two multilayered truncated corner stacked square patches, while the reactive impedance surface ris is used for antenna size miniaturization for the lower operating frequency band. Where f and c are the resonant frequency in ghz and the light speed. Review paper on gain enhancement of air filled stacked. In comparison with the conventional microstrip patch antenna, it is clear that there is an increment in the gain along the distance range from air 1 mm to air 6 mm. A variant of the patch antenna commonly used in mobile phones is the shorted patch antenna, or planar invertedf antenna pifa.
Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. Comparing the bandwidth result from the single patch antenna of 80 mhz to the side parasitic patch antenna of 300mhz, therefore, the side parasitic patch antenna has improved the bandwidth up to 375%. Although this technique is simple, radiation pattern and. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. Multiband stacked microstrip patch antenna with wide. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. If the ratio lw is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. Numerical investigation of liquid metamaterialbased. The antenna consists of a probe fed patch and two layers of parasitic patches, four patches in each layer. This paper presents a probefed compact multiband microstrip patch antenna for wideband operation. The use of metamaterials in single or multiple layers has been shown to contribute a great deal to the design of a highgain microstrip antenna at 10. Gain enhancement of a microstrip patch antenna using a. Patil2 1student 2assistant professor 1,2department of electronics technology engineering 1,2shivaji university, kolhapur, maharashtra, india abstractthis paper gives an overview of design and.
The proposed antenna is the dual stacked microstrip patch antenna. Sometimes, in order to cover several operating frequencies, a broadband antenna solution is proposed 1. First, the bandwidth of the patch antenna is very small. A rectangular micro strip patch antenna has been investigated and its performance has been analyzed with the aid of an soft hfss. To design our stacked microstrip patch antenna at around 2 ghz. This thesis proposes a stacked microstrip patch antenna that can be used for satellite. Dualband stacked rectangular microstrip antenna 167 the length of the rectangular patch driven patch l1 23. Simply microstrip patch antennas consist of a dielectric substrate on one side of a. In this paper, the design frequency and the thickness of the substrate were kept constant, while different substrate materials were used in the design of an inset fed rectangular patch antenna in other to study the effect of these substrate materials on the gain and radiation pattern of the.
For a microstrip antenna to work, you want to think the opposite thoughts that you might want to think if you were designing a microstrip mmic. Microstrip patch antennas are used for communication purposes especially in military and civil applications. The proposed model finds its applications such as high. The proposed antenna is composed of a shorted circular patch fed by foldedpatch with a vshaped slot and two stacked circular patches. Department of electronics and communication engineering national institute of technology, rourkela769008 certificate this is to certify that the thesis entitled, enhancement of bandwidth and. Secondly, the microstrip antenna was designed to operate at 100 mhz, but it is resonant at approximately 96 mhz.
Effects of using different substrates on the performance. A double layered stacked microstrip patch antenna with a single probe, feeding the lower patch, operated in the frequency range of 25 ghz is presented. Performance enhancement of rectangular microstrip patch. Parasitic resonator elements and slots with two switches are added to each patch in order to enhance and control the number of the resonant frequencies and bandwidths. The shape and size of patch determine the frequency of. The behaviour mechanism of the stacked antenna is synthetically clarified for the first time by investigating the results calculated using the fdtd method. They are usually employed at uhf and higher frequencies because the size of the antenna is directly tied to the wavelength at the resonant frequency. Analysis and design of circular microstrip patch antenna at 5. Chodavadiya department of electronics and communication engineering school of engineering, rk.
Multiforked microstrip patch antenna for broadband. Request pdf multifrequency microstrip path antenna using multiple stacked elements a multifrequency microstrip patch antenna comprised of a driven patch and a plurality of parasitic elements. Theoretical analysis of linear array antenna of stacked patches. It is used in mobile, aircraft, satellite and medical applications. Microstrip antenna has advantage of low profile, easy fabrication, simple feeding and interfaced with other ics. From the comparison, it is clear that the design with liquid multiple splitring resonators loaded microstrip patch antenna has better gain response compared to copper multiple splitring resonators loaded microstrip patch antenna for every ring condition see table 7. Planar multiresonators and stacked microstrip patch antenna techniques are combined to yield a wide bandwidth and higher gain.
The use of two stacked patches instead of single patch helps in improving impedance bandwidth and gain of microstrip antenna as described in 4, 5. A reconfigurable stacked microstrip patch antenna for. In this paper, a conventional microstrip patch antenna, stacked patch antenna has been analyzed and simulated at terahertz frequency on two substrates having different dielectric permittivity values. Multiwideband antennas design can be achieved using a stacked configuration that increase number of resonant frequencies and enhance the gain and. We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services. A variety of techniques for modeling a multifrequency microstrip patch antenna were studied and discussed.
Multiforked, multislotted, impedance bandwidth, directivity gain, high. In this paper a simple microstrip patch antenna is designed in cst microwave studio at a resonant frequency of 2. Based on the calculation, patch antennas length and width is found to be 100. Patch antenna can be designed on simulation software like hfss. Design of a multiband stacked microstrip patch antenna for satellite. Multifrequency microstrip patch antenna using multiple stacked.
Gain and bandwidth improvement, effectof patch rotation. Introduction antenna is transition structure between free space and guided device coaxial line or a hollow pipe waveguide. 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. Aggarwal department of electronics and communication engineering school of engineering, rk. Return loss of the antenna the simulated radiation pattern and gain of.
Miniaturized circularly polarized stacked patch antenna on. Stacked microstrip antenna for wideband and high gain. Microstrip patch antenna design for ku band application. Gain and bandwidth improvement, effect of patch rotation.
Electromagnetically coupled microstrip patch antennas for. Key words microstrip antenna, multiband, stacked patch, wideband. While some special shapes such as bowtie, vivaldi antenna or spiral patterns have inbuilt multifrequency tendency. The stacked microstrip antenna has particular characteristics, such as a high gain or a wide bandwidth. Review paper on gain enhancement of air filled stacked microstrip patch antenna mamata s. Rectangular patch antennas are notoriously narrowband. The values of air, in figure 4, represent the distance in mm between the twosubstrate layers. In this paper, a design of a multiwideband compact microstrip patch antenna is presented in stacked configuration. Thus the microstrip patch radiation intensity depends on what direction you are facing it from it has gain and directivity. A microstrip antenna stacked design is presented in 10. This paper demonstrates the development of insetfed rectangular microstrip patch antenna with doublep slots. The above equation says that the microstrip antenna should have a length equal to one half of a wavelength within the dielectric substrate medium. Multiple patch antennas on the same substrate see image called microstrip antennas, can be used to make high gain array antennas, and phased arrays in which the beam can be electronically steered. The various element surfaces are spaced one from another and from the reference surface with a dielectric material and.
The proposed antenna will be useful for high gain systems requiring a broadband. Frequencyreconfigurable stacked patch microstrip antenna. Bandwidth enhancement for thin substrate uhf rfid patch. A multiplefrequency stacked microstrip patch antenna structure is disclosed which provides substantially increased isolation between the multiple radiating elements and between the multiple feed elements.
Most easy and commonly used scheme is cutting of slots. With this reconfigurable antenna, multiple functions at multiple frequency bands with a single aperture is possible. Gridded parasitic patch stacked microstrip antenna with. Therefore, by applying the structure and concept from the single stacked patch microstrip antenna in 16, the 2 by 2 stacked patch microstrip array structure has been proposed a b c figure 2. When the size of the parasitic patch, is nearly equal to the fed patch and the distance between the fed patch and the parasitic patch is approximately 0. This paper present design and simulation of e and s stacked microstrip patch antenna for overcome the limitation of bandwidth of the microstrip patch antenna and conclude that stacking. The reconfigurable stacked square microstrip patch antenna supports a right hand circular polarization with a good axial ratio which is suitable for satellite communication system. Stacked gapcoupled multiresonator rectangular microstrip.
High antenna gain is generally desirable for communications systems, whether terrestrial or based on satellites. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. 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 is observed that stacked patch the variation of length of the patch parasitic patch l 24. Fundamental specifications of patch antennas radiation pattern a patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. Metamaterial enhances microstrip antenna gain microwaves. A single patch antenna provides a maximum directive gain of around 69 dbi. By definition, a printed antenna is one that is fabricated using standard photolithography technique. The center frequency will be approximately given by.
Theoretical analysis of linear array antenna of stacked. The basics of patch antennas, updated orban microwave. Microstrip patch antenna design for ku band application vijaykumar v. The proposed antenna design has a unique structure. The frequency of operation of the patch antenna of figure 1 is determined by the length l. The most common version of printed antenna is microstrip antenna, which consists of a metallic patch above a ground plane. Bandwidth and gain enhancement of proximity coupled. Different dielectric materials affect the electrical characteristics of a patch antenna differently. Microstrip patch antenna is an important antenna above 1ghz in wireless communication. Typical half wave patches have efficiencies well above 90%. Design of a multiband stacked microstrip patch antenna for satellite communications application by hadef ahmed alshamsi a thesis submitted in partial fulfillment of the. Design of a multiband stacked microstrip patch antenna for. It is further observed that the resonance frequency, gain and directivity are highly dependent on the thickness and permittivity of the upper substrate.
The printed planar antenna has gained the operating frequencies of 1. Compact multiband stacked circular patch antenna for. Multifrequency microstrip path antenna using multiple stacked elements article in ieee microwave and wireless components letters 3. The effect of the air gap distance on the gain of the dual layer microstrip patch antenna at the desired frequency is shown in figure 4. P, india abstract here we made an attempt to maximize the gain of microstrip patch antenna. Sabban, a new broadband stacked twolayer microstrip antenna, ieee aps int. Multifrequency microstrip path antenna using multiple. Stacked patch design at 2 ghz the focus of this paper is to design a recon. A multiple resonance microstrip antenna radiator which includes a plurality of stacked electrically conductive element surfaces disposed above an electrically conductive reference surface with each element surface dimensioned so as to resonate at a different radio frequency. The microstrip line is also a quarter wave transformer transforming the input impedance 50. This paper proposes a compact microstrip patch antenna for operating in 2.