Few points a microstrip patch antenna consists of a radiating patch on one side of a dielectric substrate which has a. The proposed antenna is suggested to be used in a mobile phone handset that covers three frequency bands which include gsm 900 889960. Several prototype antennas operating at frequency ratios ranging from 1. The overlap between the patch antennas and their feed line is indicated as s.
The modal distributions of hmsa are studied and it was observed that hmsas distribution. The microstrip antenna produces maximum radiation in the broadside perpendicular to the substrate direction and ideally no radiation in the endfire along the surface of the substrate direction. On the other hand, at the upper frequency band, the antenna maximum gain is 2. Dualfrequency microstrip antenna for wireless applications. I designed a dual band microstrip patch antenna resonating freq 3. This transverse with respect to the zaxis is usually dropped because the magnetic fields in patch antennas are always transverse to their zaxis. In section 4, a dual frequency dual band microstrip antenna is designed, which is used to realize the dual band operation on the radiation side. Pdf microstrip antennas msa find increasing applications in military, communication and consumer electronics, etc. Dec 05, 20 the dualband operation of a microstrip patch antenna on a duroid 5870 substrate for ku and kbands is presented. Antennas using patches as constitutive elements in an array are also possible. A miniaturized dualfrequency dualpolarization microstrip patch antenna with high isolation between receiving and transmitting ports operating at 2. This may be replaced with a physical shorting plane to create a quarterwavelength microstrip antenna. Circularly polarized s band dual frequency square patch.
Tm stands for a magnetic field distribution between patch and ground that is transverse to the zaxis of the antenna shown in figure 1. Microstrip patch antenna assisted compact dual band. I attached the two radiation patterns simulated in cst. Dual frequency rectangular microstrip antenna page 5 1. The antenna only has a single radiation edge equivalent slot which lowers the directivitygain of the antenna. Analysis of dual frequency microstrip antenna using shorting.
Shortly thereafter, lewin investigated radiation from stripline discontinuities. Dual frequency, microstrip patch antenna, microstrip line, uwb. Frequency reconfigurable antenna is a possible candidate to improve the problem. In this paper, a new dualfrequency, compact antenna, which uses an hshaped microstrip patch with a shorting pin, is described. The permittivity should be low for large bandwidth but high to make the patch antenna smaller. The fields are linearly polarized, and in the horizontal direction when viewing the microstrip antenna as in figure 1a well see why in the next section. Patch antennas has been reconfigured for frequency 2, radiation pattern 3 and so on. In12, the impedance properties of a dual frequency concentric annular ring microstrip patch antenna are described. Design parameters and tradeoffs are presented for microstrip antennas.
Typical half wave patches have efficiencies well above 90%. A method of beam matching between two linear polarised radiation patterns of a dualpolarised frequency scanning antenna is proposed, implemented, and tested. Different methods to analyse the performance of this. Typically, patch antennas are narrowband and their q factor is inversely proportional to frequency. In this paper, a microstrip patch antenna with rectangular slot is proposed to obtain the dual band operation in the frequency range 2 to 5ghz. The patch of the antenna must be a very thin conductive region, t dual layer microstrip antenna design for mobile handset. But if you look at s11 graph, return loss is almost same for both frequencies. New types of microstrip antennas for the applications.
A broadband dual band printed antenna for wlan is designed in section 3. Modified dual band stacked patch cp antenna was designed for gps application. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. The antenna size is very compact 40 mm x 60 mm x 1. Microstrip patch antennae radiate primarily because of the fringing fields between the patch edge and the ground plane. Therefore, a great number of designs related to the reconfigurable microstrip antenna have been proposed in. Results and discussion the sparameters measurements for the. The dual frequency microstrip patch antennas are widely used to meet the need of frequency reuse often required in wireless communication, satellite systems, radar, synthetic. Bandwidth enhancement of a dual band planar monopole. Microstrip patch antenna assisted compact dual band planar.
Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. There is also the antenna 21 that used a stacked patch and uslot to. On the other hand, rectangular patch with ground plane ring slot cp antenna achieved dual frequency but no gain was mentioned in this paper. A dualfrequency microstrip patch antenna is proposed based on rectangular microstrip patch, with appropriating feed location selection of 50. Mar 26, 2017 structurally robust and light weight a microstrip antenna msa in its simplest form consists of a radiating patch on one side of a dielectric substrate and a ground plane on the other side. The concept used in calculating resonant frequency. For good antenna performance, a thick dielectric substrate having a low dielectric constant radiation. Dualband microstrip circular patch antenna with monopolar radiation pattern.
Miniaturized highisolation dualfrequency orthogonally. Design of frequencyagile microstrip antennas with conical. A stable omnidirectional radiation pattern is observed in the operating frequency band. Normalized radiation pattern for microstrip patch antenna. It is a popular printed resonant antenna for narrowband microwave wireless links that require semi hemispherical coverage. This research proposes a dual frequency circularly polarized truncated square aperture patch antenna with slant stripline and lshaped slot for wlan applications.
Microstrip antenna, its disadvantages and it has been overcome by dual frequency hexagonal microstrip patch antenna using slots. For the construction of the antennas it has been used microstrip antenna technology, because it has been demonstrated that it is suitable for these applications due to their many advantages such as low profile and weight, easy integration with printed circuits. A pair of narrow slots is embedded close to the radiating edges to achieve dual frequency operation. At first, a conventional patch antenna is designed on fr4 epoxy substrate with 1.
Tl model of microstrip patch antennas partially filled with clrh structures a conventional square microstrip patch antenna can be modeled as an openended tl. A dualband slotembedded microstrip antenna for dual. The directivity of patch antennas is approximately 57 db. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. By attaching a strip to the radiating edges opposite to the microstripfed line, this alters the current distribution and radiation on the antenna at the second resonant frequency. This category can be extended to any kind of patch shape that offers two crosspolarized resonant modes. In the antenna design, the parameters were optimized and the wlanenabled dual frequency 2. This is in agreement with the theoretical radiation.
By adjusting the size of these structures, a dualband antenna can be obtained. Initially the fundamental monopolar mode was achieved with circular. Gada mahmood faisal 1, kaydar majeed quboa 1, dia mohamad ali 2. In this article electrically small, dual band, triple frequency x shaped patch antenna on a substrate of ceramicptfe composites is presented. The proposed x shape patch antenna with five rectangular slots produces dual band operation for ku band applications and one for k band applications. Equation 1 below gives the relationship between the resonant frequency and the patch length. They are the original type of microstrip antenna described by howell in 1972. Design of dual frequency single aperture microstrip. A single patch antenna provides a maximum directive gain of around 69 dbi. A novel dual band microstrip monopolar patch antenna with zerothorder resonance is proposed and analyzed in this letter.
New dualfrequency microstrip antennas for wireless communication. A multislotted wide microstrip patch antenna for dual frequency. The basics of patch antennas, updated orban microwave. The main reason for the high q factor is that patch antennas are essentially circuits printed on a relatively thin substrate. The patch antenna is mainly practical at microwave frequencies, at which. Dualband operation of a microstrip patch antenna on a duroid.
Dualband slot microstrip patch antennas with dualradiation. Radiation pattern for a dual band microstrip patch antenna. Kband crossaperture coupled circularly polarized dual. Results and discussion the sparameters measurements for the microstrip patch antennas were done by using a vector. These results show that a microstrip patch antenna mainly radiates in the vertical direction. The stacked antenna 20 uses two circularly polarized antennas of the different frequency band with good isolation together. A multislotted microstrip patch antenna for dual frequency. The most common version of printed antenna is microstrip antenna, which consists of a metallic patch above a ground plane. Design of miniaturized dualband microstrip antenna for wlan. Fdtd analysis of a dualfrequency microstrip patch antenna. Dept, college of engineering, mosul university, mosul iraq. Dualband slim microstrip patch antennas ieee journals. Microstrip antennas are relatively inexpensive to manufacture and design because of the simple 2dimensional physical geometry. The designed antenna has a frequency bandwidth of 184 mhz with the upper cutoff frequency of 2.
Dual frequency microstrip antenna all dimensions are in mm figure 2. The proposed antenna consists of a modified rectangular radiating patch, two 50. Next, a rectangular patch antenna electromagnetically coupled to two inverted microstrip line feeds for dual linear polarization frequency is schematically illustrated in figure 3. Lcong department of electrical and computer engineering, national university of singapore, singapore abstract. Most of the other dual frequency patch antennas found in the literature can be subdivided into 2 multi patch dual frequency antennas, and 3 reactive2yzoaded dual frequency patch antennas. 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.
The measured gains of the the gains of the antenna at gps frequency and bluetooth frequency were 3. Pdf dualfrequency patch antennas may provide an alternative to largebandwidth planar. Design of the circular microstrip patch antenna for designing a circular microstrip patch antenna, the calculations are done as below 11. The size of the antenna is usually designed such that the antenna resonates at the operating frequency, producing a real input impedance. The halfwave rectangular microstrip antenna has a virtual shorting plane along its center. The proposed antenna consists of a rectangular ground plane, a ushaped feed probe, and an hshaped slot radiating patch.
Concentrically shorted patch microstrip antennas have the unique feature that their fundamental mode has a monopolarlike radiation pattern omnidirectional with e. The antenna has been designed, modelled and simulated. Dual band x shape microstrip patch antenna for satellite. All of the above antenna configurations were intended for operation at a single design frequency. Figure 1 represents the fabricated antenna prototype alongside the schematic of the doublep shape slotted insetfed patch antenna structure. The investigations on two new shortcircuited microstrip patch antennas, which are. Dual band microstrip patch antenna for sar applications. The shape and size of patch determine the frequency of operation of the antenna and its performance. The proposed prototype antenna behavior is discussed in terms of the.
The figure below represents the radiation pattern of the microstrip antenna. Dgw with defected square patch is first proposed to excite a single. A dualfrequency compact microstrip patch antenna s. In this paper, a cp almost square microstrip patch antenna with corners truncated, and excited by a crossaperture with unequal slot lengths, for dual frequency satcom applications. This is true in general, even for more complicated microstrip antennas that weave around the length of the longest path on the microstrip controls the lowest frequency of operation. Pdf dual frequency microstrip array antenna for sar.
Introduction the dual frequency microstrip patch antennas are widely used to meet the need of frequency reuse often required in wireless communication, satellite systems, radar, synthetic aperture radar sar, global position system gps applications. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. This antenna is designed on fr4 substrate with thickness h of 1. This paper presents a coaxillyfed singlelayer compact dual band c and xband microstrip patch antenna for achieving dualpolarized radiation suitable for applications in airborne synthetic. The present work deal with the design of a triple band, dual layer microstrip patch antenna. A dualfrequency patch antenna with monopolar radiation.
In addition, the frequency reconfigurable antenna has other advantages over the wideband antenna, such as smaller size and more stable radiation pattern. Various dual band antennas with shared aperture configurations have been successfully implemented depending upon frequency separation ratio. Designing for designing of a microstrip patch antenna, we have to select the resonant frequency and a dielectric medium for which antenna is to be designed. Pdf the investigations on two new shortcircuited microstrip patch antennas, which are able. Dielectric ceramic loaded stripline antennas have several advantages, namely small size, fairly narrow but still wide enough frequency band, and good temperature stability. A novel dualband microstrip monopolar patch antenna with zerothorder resonance is proposed and analyzed in this letter. Like other typical microstrip patch antennas, the proposed antenna contains an sma. Thus, the antenna must also have a dualband characteristic. Design of an uwb patch antenna for dual frequency operations. A progression of simulation in ansoft hfss high frequency system simulation has been carried out to discover the dual operating frequency.
Generally, hemispherical coverage is provided by a patch antenna at an angle of 30. Low crosspolarisation highisolation frequency scanning aperture coupled microstrip patch antenna array with matched dualpolarisation radiation patterns abstract. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Comparing with the conventional rectangular patch antenna, the impedance bandwidths for dualfrequency antenna is increased to 7. New types of microstrip antennas for uhf applications. Basically transmission line modelling approach has been used to model the antenna.
By definition, a printed antenna is one that is fabricated using standard photolithography technique. Figure 16 shows a microstrip antenna or patch antenna for a global positioning system gps receiver, using a high k dielectric substrate. Antenna structure the geometry of microstrip fed patch antenna for rfid applications is shown in figure 1. Book topics include discussion of arrays, spectral domain, high tc superconducting microstrip antennas, optimization, multiband, dual and circular polarization, microstrip to waveguide transitions, and improving bandwidth and resonance frequency. Design of dual frequency stacked patch antenna for l. This patch operates at two frequency bands which may be closely spaced about the tm12 mode. The inset in figure 3 shows a circular patch antenna.
The aim of this research is to achieve smaller size, better bandwidth and good radiation capability. Low crosspolarisation highisolation frequency scanning. A dual band microstrip rectangular patch antenna for wlan in vehicular communication applications is proposed. As an example, the size must increase to have it work at lower frequencies. Rectangular patch antennas are notoriously narrowband. In this paper, a novel compact dualband microstrip patch antenna with dualradiation modes is investigated.
Secondly, the microstrip antenna was designed to operate at 100 mhz, but it is resonant at approximately 96 mhz. Moreover, the microstrip patch antennas can provide dual and circular polarizations, dualfrequency operation, frequency agility, broad bandwidth, feed line flexibility, and beam scanning omnidirectional patterning. Pdf new dualfrequency microstrip antennas for wireless. The antenna is a combination of circular patch antenna with centerfed and circularly periodic mushroom units.
A new type of dualfrequency rectangular microstrip array antenna is proposed, which is designed by using a simple corporate feed arrangement. In this paper, a novel compact dualband microstrip patch antenna with dual radiation modes is investigated. The widely popular, commercially available 3dimensional full wave high frequency electromagnetic structural simulation hfss tool is used for the design and simulation of the proposed meanderd microstrip fed vertical slot loaded circular monopole antenna. Indeed, the opti mal antenna for a specific application is one that ensures the matching of the bandwidth of the transmitted andor the received signal. Pdf dualfrequency patch antennas may provide an alternative to large bandwidth planar. In this paper, a threelayer dual feed stacked microstrip antenna was designed with thickness more than half a wavelength. Dualfrequency microstrip antenna all dimensions are in mm figure 2. This paper presents a coaxillyfed singlelayer compact dual band c and xband microstrip patch antenna for achieving dualpolarized radiation suitable for applications in airborne synthetic aperture radar sar systems.
Moreover, a pair of stepslots 4 or a pair of properlybent narrow slots 5 embedded near the nonradiating edges. Dualband microstrip circular patch antenna with monopolar. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. The radiation pattern, antenna efficiency input impedance was also analyzed. Advancement in microstrip antennas with recent applications. Pdf design of a dual band rectangular microstrip antenna. Key words microstrip antenna, dual frequency spa, hfss. Design of microstrip patch antenna for dual band operations. Wong and hsu1997 incorporated a ushaped slot in a equilateral triangular microstrip antenna to make it a broadband structure. In this paper, we present a dual frequency, square spiral microstrip patch antenna constructed from multiwalled carbon nanotubes mwcnt ink deposited on a thin flexible fr4 substrate using a cold printing process. For microstrip patch antennas, dualfrequency dualpolarization can be easily realized by using a pair of feeds to, respectively, excite two orthogonal fundamental modes from a single radiating patch. The most common type of microstrip antenna is the patch antenna.
Jan recently, patch antenna is extensively used in ultrawide band uwb applications and is continuing to fulfill the changing demands of new generation antenna technology. A triangular patch antenna for uhf band with microstrip. Lu2003 analyzed a circular patch antenna and its arrays with a pair of lshaped slots for broadband dual frequency operation. Dual band x shape microstrip patch antenna for satellite applications. This shift is due to fringing fields around the antenna. Microstrip antenna an overview sciencedirect topics. 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. Using ie3d software package of zeland, according to the set size, the antenna is simulated. Jul 06, 2017 low crosspolarisation highisolation frequency scanning aperture coupled microstrip patch antenna array with matched dualpolarisation radiation patterns abstract.
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. This thesis involves the design and analysis of dual band microstrip patch antenna which operates at lower and upper resonating frequency of 3. The patch of the antenna must be a very thin conductive region, t microstrip patch antenna are presented. The fabrication of the proposed antenna is performed with slots and a duroid 5870 dielectric substrate and is excited by a 50. Dualfrequency circularly polarized truncated square. The designed microstrip patch antenna operates at center frequencies of 6. Alike typical microstrip antenna, the proposed antenna is made up of a mirrored pshape slotted radiating patch, a 50. The effects of various antenna parameters on two resonant frequencies, frequency ratio, and radiation pattern characteristics of the antenna are analyzed and. Figure 2 present the simulated 2d cut view and 3d far zone eplane radiation patterns for this antenna. Dualfrequency antennas exhibit a dualresonant behavior in a single radiating structure. 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. Dualfrequency circularly polarized truncated square aperture. The simulated plot for gain of the antenna is shown in fig. Menon id department of electronics and communication engineering, amrita university, amritapuri 690525, india.