For the past decades, the microstrip, slot, and stacked patch antennas have been used to. A few designs by using u slot in getting the dual frequency and circular polarization were widely discussed in 511. A compact microstrip patch antenna with two u slots shape is presented. The u slot patch antenna was originally developed as a singlelayer, single patch wideband antenna.
The maximum back to front level was about 14 db at the frequency of 5. The reported double u slot cut rectangular microstrip antenna yields dual and wide band operation in 2100 and 5400 mhz frequency bands. The slot reduces the area of copper sheet which leads to less value of quality factor hence bandwidth increases. Dual frequency operation is achieved by inserting a. Introduction antenna, used for transmitting or receiving radio signals, is one of the most important parts of wireless communication system. Matin department of computer science and engineering brac university 66, mohakhali, dhaka 1212 bangladesh abstract. The first u slot primarily optimizes the position of tm 01 and tm 20 modes of the patch to realize dual and wide frequency response in 2100 mhz frequency range. The proposed antenna is verified experimentally and the simulated and measured results are in good agreement. Simulation results place the hshaped patch antenna with double u slot in to it was achieved. Broadband microstrip patch antenna using dual uslot with low profile has been proposed and analysis of results has been done by using ie3d simulator. Design of triplelayer double uslot patch antenna for.
Actually, slot antenna is a radiating element formed by a slot in a metallic surface. Abstract this paper presents the numerical simulation of double uslots microstrip patch antenna for w imax application. This paper presents the dual u slot hshaped microstrip patch antenna feed by transmission line. As a result triband response is achieved with gain reaching 0. Multiresonator design of rectangular microstrip antenna embedded with rectangular and half u slot is reported that yields bandwidth of 280 mhz 28%. But they were achieved nearly 16db of return loss only. The antenna size had been reduced by 75% when compared to conventional antenna 7. Abstracta novel design of patch antenna is presented with double u slot structure on patch with ground irregularities. In this design two slots and one bridge elements have been applied to generate the three frequencies bands. Recently, proposed printed antenna for wimax operation has the three frequencies bands but the return loss not over 30db 3. Dec 05, 2016 i built this slot antenna several years ago and have used it with very good results in illuminating a parabolic dish for 2. The required bandwidths are fulfilled the wimax technology 4.
Jul 17, 2018 bibtex does not have the right entry for preprints. The analysis of dual band double u slot cut rectangular microstrip antenna is presented. My intention for posting just pictures with dimensions is for. What is the difference between slot antenna and patch antenna. Abstract this paper presents the numerical simulation of double uslots microstrip patch antenna for wimax application. A double u slot microstrip antenna was used for mobile wimax application. In order to increase the gain and transmit radiations over all frequency bands, the double lslot microstrip patch antenna array design has been extended for both wimax and wlan applications in. Design of multiband uslot microstrip patch antenna for gsm. Connected uslots patch antenna for wimax applications. Modified double u slot penta band microstrip antenna for. A multi u slot patch antenna has been reported recently for 5 ghz wlan 7, and also a monopole antenna for wimax applications was proposed in 8. Slot loaded microstrip antenna for gps, wifi, and wimax. The methods developed for efficient wideband patch antenna design are based on one or more of the following.
The fabricated antenna was installed on a networked wifi access point. A practical slot antenna is the cavitybacked slot antenna. Pdf design of double uslot multiband microstrip patch antenna. Uslot dual band aperture coupled microstrip antenna for wlan. In this paper, a modified double u slot planar microstrip antenna is designed, simulated and fabricated to operate at 2. Double u slot microstrip patch antenna for wlan and wimax applications md. Compact double uslots patch antenna for mobile wimax. Multiband applications can be realized as a result of designing a double u slot rectangular patch antenna. The uslot antenna concept has been used in patch antenna designed to reduce antenna size. Microstrip patch with a dielectric cover is considered as a single patch with a semiinfinite superstore with re. Double uslot microstrip patch antenna for wlan and. When a u slot is cut in the patch, a notch is introduced within the matching band, results in dualband antenna. Analysis of double ushaped slot loaded patch antenna for.
So for the antenna miniaturization i and bandwidth improvement bridged double u slot micro strip patch antenna. And it resonates at another frequency for the insertion of second u slot inside the patch. When a uslot is cut in the patch, a notch is introduced within the matching band, results in dualband antenna. Dual band double uslot loaded antenna with ground slot. Low profile frequency reconfigurable triple band antenna. Due to the presence of the stacked patch antenna, there are two resonances associated with the two resonators 12. The antenna gain was found to be about 8 db for the entire bandwidth.
Figure 1 configuration of the double uslots patch antenna on a. Recently, proposed printed antenna for wimax operation has the three frequencies bands but the return loss not over 30db. Dual band double uslot loaded antenna with ground slot for. Dual frequency operation is achieved by introducing half u slot in a semicircular disk patch antenna 4. Design of double uslot multiband microstrip patch antenna.
In particular, the u slot patch 1 enable a single patch single layer microstrip antenna to attain over 30% impedance bandwidth. A prototype antenna is fabricated and experimentally verified. The slots cause the increase in inductance on the current path of the signal. The proposed antenna is feed by the transmission line. It has been demonstrated that the gain has increased considerably when compared to single patch antenna. The strong back radiation is a major disadvantage of a resonant slot aperture coupled patch antenna.
Gsm, bluetooth, wlanwifi, wimax and some defence applications such as radio navigation. Unfortunately, the equations related to the cavity backed slot antenna are somewhat complicated and in my opinion dont give a good idea of how they work. The upper patch is double u shaped slot loaded stacked patch and the lower patch is the h slot loaded fed patch. The presented antennas are suitable for multiband wireless communication systems. For the past decades, the microstrip, slot, and stacked patch antennas have been used to implement multiband. The uniqueness of this design is that a double uslot patch is designed on a single substrate with single feed. Design and study of compact and wideband microstrip uslot.
U slot patch antenna for broadband wireless communications m. Analysis of multiresonant rectangular microstrip antenna. A novel hshaped patch antenna suitable for wireless and satellite communications is presented. Uslot patch antenna has been reported recently for 5 ghz wlan 7, and also a monopole antenna for wimax applications was proposed in 8. A new dualband microstrip antenna with ushaped slot and a. Double u slot patch antenna has been reported recently 9 for wimax applications. Half u slot patch antenna with shorting wall reported in 8 with 28% impedance bandwidth. Its implementation is well done around the worldand share the market with wimax and lte for wireless communications. A multiband triplelayer probe fed double uslot microstrip patch antenna for next generation wireless applications is proposed in this paper. Detailed simulation and experimental investigation are conducted to understand the behavior of the two u. The use of thick and low permittivity substrates is the main reason for achieving wide impedance bandwidth. The double modified u slots planar patch antenna is designed, simulated and fabricated to operate at 2. The broadband characteristic of a microstrip patch antenna with ushaped slot.
The results of proposed antenna shows that by using proper slot size on patchs surface the performance of antenna can be improve. What is the difference between slot antenna and patch. Simulation results in this section, the simulation and analysis is done for the proposed quadband u slot microstrip patch antenna by ansoft hfss simulation software. By using mathematical analysis we have designed the u slot microstrip antenna for amateur radio application which operates in the frequency band 5. In this paper, a modified double u slot planar microstrip antenna is designed, simulated and. Parametric studies of antenna structure with double u slot. A corporatefed hshapedpatch antenna with uirs for wifi. The broadband characteristic of a microstrip patch antenna with ushaped slot has been confirmed by many published results 24. A compact dual frequency double uslot rectangular microstrip patch. This directional antenna is a simple design with a gain of 4.
Uslot patch antenna for broadband wireless communications. The proposed antenna generates three resonant frequencies at 2. In the proposed antenna design, a combination of dual u slot and multiple layers is used to get multiple bands and wide bandwidth. Recently, proposed printed antenna for wimax operation has the three. Uslot microstrip antenna for amateur radio application. A dual u slot h patch configuration is proposed to increase the narrow bandwidth, radiation efficiency and directivity. The antenna gives the first resonant frequency due to patch itself and small u slot. It has recently been shown that it can also be designed to perform a number of other functions. A low profile double uslots antenna for wimax operation has low return loss and bandwidth.
Bridged double uslot microstrip patch antenna for wireless. A multi uslot patch antenna has been reported recently for 5 ghz wlan 7, and a monopole antenna for wimax applications was proposed in 8. Several types of antennas are available in practical. Design of double u slot patch antenna a low profile double u slots antenna for wimax operation has low return loss and bandwidth.
In this paper, a multiband microstrip patch antenna with simple strip line feeding, which enables a handheld communicating device to. Design structure of the single u slot patch w 40mm c1 5mm. The radiation performance such as vswr, return loss, radiation pattern and gain of the antenna are simulated using ansoft hfss and presented. Here the double u slots have been combined with bridge gap.
The variations in bridge gap optimize the antenna performance such as return loss and vswr. One of the main restrictions with patch antennas is their naturally narrowband performance due to its resonant nature. Also, several designs of broadband slots antenna have been reported 56. Analysis of double uslot cut rectangular microstrip antenna. Double uslot rectangular patch antenna for multiband applications. But when patch is loaded with yshaped slot along with ushaped slot placed asymmetrically to the patch center, the antenna resonates at 1. A dualband characteristic was obtained by using a double u slot in the patch. Various parameters of the antenna are as shown below. The consequences of designing indoor wireless systems with directional antennas at one or both ends of line of sight. It has been developed to be used in future wimax technology. In addition, the antenna has achievable return loss, radiation pattern and also bandwidths. This paper presents a compact dual band rectangular microstrip patch antenna for wireless applications. This should increase the bandwidth of the antenna as well as gain.
Design of double uslot microstrip patch antenna array for. Double ushaped slots loaded stacked patch antenna for. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Dual band double uslot loaded antenna with ground slot for wifi and wimax applications abstract. Index term double uslot, patch antenna, small antenna, ushape antenna, wimax antenna.
Dual uslot microstrip patch antenna with enhanced bandwidth. International journal of computer applications 1626. H 3 2 antenna basics an antenna is basically a conductor exposed in space. This paper presents the multiband u slot microstrip patch antenna cover 3. To increase the bandwidth of the antenna, a rectangular slot is inserted inside a ground plane. Adjustments to be made in antenna geometry to optimize the three different operating frequencies of 2. In fact i want to knowhow to plot axial ratio of a circularly polarized antenna vs frequency tha gragh is a cartesian one ar ffrequency. Tiny microstrip antenna covers wlan, lte, and wimax. In this paper, microstrip patch antenna fed through an aperture coupled 50. Two u shaped slots reduce the overall impedance of antenna. Request pdf a compact dual frequency double uslot rectangular microstrip patch antenna for wifiwimax.
On the use of slots in the design of patch antennas. A slot planar patch antenna is designed, simulated and fabricated to operate at 2. Several types of antennas are available in practical, but microstrip patch antenna mpa is one of the most. If another u slot is cut in the same patch, antenna becomes a tripleband antenna. Double lslot microstrip patch antenna array for wimax and. The proposed design of the antenna is shown in fig. I tried your model but i cant get the same results. Further the second u slot optimizes the position and impedance at higher.
Dual band double uslot loaded antenna with ground slot for wifi. The broadband characteristic of a microstrip patch antenna. Double uslot rectangular patch antenna for multiband. With modification, it is amenable to waveguide, coplanar waveguide cpw, coaxial, slot line, or microstrip feeding schemes and has been used in all aspects of wireless and radar applications. In this paper, a single patch wideband microstrip antenna resonating at 4. The multiband u slotted patch antennas are usually designed with complex feeding such as lprobe, mprobe feedings. In the present paper, a double u shaped slot loaded rectangular microstrip antenna is designed and analyzed. This is a hack for producing the correct reference. Coaxial cable is mounted with patch as medium of power. Design of triplelayer double uslot patch antenna for wireless. One of the drawbacks was complicated antenna structure 9. Ata and mohammad salamin and khaleel abusabha, title design of multiband u slot microstrip patch antenna for gsm wlan and wimax applications, howpublished easychair preprint no. Patch antenna for 2 4ghz with circular polarisation youtube. Slot antenna differs with patch antenna in many aspects.
Design and analysis of compact u slot microstrip patch. Aug 24, 2014 in this video i will show you how to build a very simple circular polarised patch antenna for 2. Geometry of the proposed u slot microstrip antenna. Dual frequency operation is achieved by inserting a pair of symmetric facetoface uslots on a top radiating patch. It is observed from the extensive parametric study that the antenna possesses triple bands in most of the cases. In microstrip antennas, embedded slots can also be used to enhance the impedance bandwidth of a single band antenna. In this paper, a double lslot microstrip patch antenna array using coplanar waveguide feed for wireless local area network wlan and worldwide interoperability for microwave access wimax. A multiband triplelayer probe fed double u slot microstrip patch antenna for next generation wireless applications is proposed in this paper. Parametric studies of antenna structure with double. It has a triple band of frequency the propose antenna 12for specific wimax application is shown below figure 6.
A microstirp patch antenna with double lslot for both wimax and wlan application is reported in. Hence, ill present the basics, present some experimental results and try to give an idea of design parameters. In this paper, a double u slot microstrip patch antenna is designed and simulated for wimax bands. A multi uslot patch antenna has been reported recently for 5 ghz wlan 7, and also a.
The proposed triplelayer double u slot patch antenna is simulated in hfss solver and fabricated using thermolithography process. The antenna is designed based on extensive ie3d simulation studies. Dimensions of the proposed u slot microstrip patch antenna fig. The uslot patch antenna structure consists of a patch, ushaped slot, a ground plane and coaxial feed lines. Design of dual band aperture coupled microstrip antenna with u slot in this design u slot is cut in the patch and ground and dual band is obtained. This paper proposes the use of a patch antenna with two u shaped slots to achieve dual band operation. This antenna covers all the operating bands of wlan and wimax but the gain is reduced due to more number of slots on the patch. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content.
Positioning the double u slots on the patch was a main challenge in the design, since in order to get a compatibility between the two slots and the desired operation frequency, optimized positioning of the two slots on the patch was required. Dual frequency operation is achieved by inserting a pair of symmetric facetoface u slots on a top radiating patch. Double uslot microstrip patch antenna for wlan and wimax. Wireless local area network or wifi wireless fidelity is a way to transfer data without cables. Abstract in this study, a 28ghz uslot rectangular microstrip patch antenna for 5g applications is proposed. In, a double u slot microstrip patch array for wiwax application for enhancing the gain has been addressed. Pdf triple band double uslots patch antenna for wimax. This paper presents the numerical simulation of double u slots microstrip patch antenna for wimax application. It is seen that the applications which require dual frequency operation with small frequency ratio were designed by using the u slot in a wideband microstrip antenna 6. Substrate 1 substrate 2 fed patch parasitic patch ground plane coaxial feed a b coaxial feed ground plane substrate u slot patch stacked parasitic patch ushaped slot seldom exceeds 20% bw. Design of multiband uslot microstrip patch antenna for. So could you tell me please what was wrong with the model and how to deal with the ar.
A microstirp patch antenna with double l slot for both wimax and wlan application is reported in. The antenna configuration and details of the dimensions of the geometrical. Detailed simulation and experimental investigation are conducted to understand the behavior of the two u slots. The slot antenna, consisting of a narrow slit in a ground plane, is a very versatile antenna. Structure in the ground plane of the microstrip patch antenna are used to achieve small size, multiband and high gain10. Pdf dualand tripleband uslot microstrip patch antenna. Design of multiband u slot microstrip patch antenna for gsm. Multiband uslot microstrip patch antenna with defective. Patch antenna is actually a patch antenna placed over a antenna base. Index term double u slot, patch antenna, small antenna, u shape antenna, wimax antenna. Double uslot microstrip patch antenna for wlan and wimax applications.
If another uslot is cut in the same patch, antenna becomes a tripleband antenna. Double uslots patch antenna for triband wireless systems. Examples of cutting slots include probefed u slot patch antennas, double u slot patch antenna, double c patch antennas, and eshape patch antennas which provide excellent bandwidths. A novel design of patch antenna using uslot and defected.
A thick substrate helps broaden the individual bandwidths. By introducing slot at an appropriate position on the rectangular patch, wider bandwidth has been realized. In this context, the present study investigated the possibility of designing. A multiband triplelayer probe fed double uslot microstrip patch antenna for.
A 28ghz uslot microstrip patch antenna for 5g applications. To analyze the dual band response at above frequencies, the resonance curve plots and surface current distributions for equivalent rectangular patch and single u slot and. If the length of the conductor is a certain ratio or multiple of the. Microstrip patch antennas are strong candidates for use in many wireless communications applications.
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