Multi band curved uslot edge feed triangular microstrip. The feed points are carefully chose to achieve a wide bandwidth. Parametric studies of antenna structure with double u slot, variation of feed position, and also with multiple layers are presented. It is easy to see that when the phase is 0 degree or 180 degrees, the surface current direction of the middle arm of the inductive double loop and the. In this paper, a double uslot microstrip patch antenna array for worldwide interoperability for microwave access wimax is presented.
It has a triple band of frequency the propose antenna 12for specific wimax application is shown below figure 6. Dec 20, 2012 the uniqueness of this design is that a double u slot patch is designed on a single substrate with single feed. Compact double uslots patch antenna for mobile wimax. Double uslot rectangular patch antenna ieee xplore. The proposed design of the antenna is shown in fig. Broadband microstrip antenna msa is more commonly realized by cutting the slot inside the patch, which is fabricated on lower dielectric constant thicker substrate h. Therefore, the antenna will be better work in the wi max applications and wireless communications system. Citeseerx document details isaac councill, lee giles, pradeep teregowda.
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. In summary, a novel dualpolarized slot antenna with two coaxial feed lines was designed and fabricated. Unfortunately, the equations related to the cavity backed slot antenna are somewhat complicated and in my opinion dont. The antenna is fed by an antennafeed that has an impedance of, say, 50. A coaxial probe feeding is located along the orthogonal axis of the array. The designed antenna can excite six operating bands by double uslot cut on array. On the use of slots in the design of patch antennas. The feed position of a patch antenna excited in its fundamental mode is typically located in the center of the patch width direction y axis and somewhere along the patch resonant length direction x axis. It has recently been shown that it can also be designed to perform a number of other functions. Substrate with low dielectric constants, multilayer structures and use of air gaps between the. A double loop inductive feed planar patch antenna is proposed for uhf rfid tag mounted on metallic objects. The gapcoupled configuration with ring patch and slot cut ring patch yields bandwidth of nearly 430 mhz with broadside radiation pattern and peak gain of more than 9 dbi. Design of multiband uslot microstrip patch antenna for.
Probe is feed down to the uslot to get optimum results. By using special slots in its circular patch radiator and short pins between the patch and the ground plane, the antenna realizes low crosspolarization of under 35 db while also achieving high isolation of better than 36 db. Actually, slot antenna is a radiating element formed by a slot in a metallic surface. Using double or dual slot stacked patch technique use can get better return loss by increases the length and. The radiation performance such as vswr, return loss, radiation pattern and gain of the antenna are simulated using ansoft hfss and presented. A dualband uslot microstrip antenna with dualfeed and doublelayer abstract. The uslot antenna concept has been used in patch antenna designed to reduce antenna size. Hence, ill present the basics, present some experimental results and try to give an idea of design parameters.
The u slot patch antenna was originally developed as a singlelayer, single patch wideband antenna. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. A new dualband microstrip antenna with ushaped slot and a. Dual u slot loaded patch antenna with a modified l probe. Design structure of the single u slot patch w 40mm c1 5mm. Variation of slot width hence the above results shows the variation of.
Designs of both single and double uslot are shown below. 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. Fokhrul islam, journalinternational journal of computer applications, year2017, volume162, pages4448. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Dual ushaped slots are incorporated in the radiating patch and a maximum bandwidth of 16. It has a triple band of frequency the propose antenna12for specific wimax application is shown below figure 6. Setting up a port for a microstrip transmission line is a bit complicated.
The uniqueness of this design is that a double uslot patch is designed on a single substrate with single feed. Analysis of microstrip line feed slot loaded patch antenna using arti. Design of double uslot patch antenna a low profile double uslots antenna for wimax operation has low return loss and bandwidth. If array of the u slot patch antenna is used then the gain can be im proved. Design structure of the single uslot patch w 40mm c1 5mm. Setting up a port for a microstrip transmission line. Cutting uslot inside the patch is used to obtain the dual band characteristics. Shivnara yan et al slot loaded rectangular microstrip patch antenna 425 the present work, the patch is fed by coaxial cable 50 ohm. Figure 6 from double uslot microstrip patch antenna for. Uslot microstrip antenna for amateur radio application. Double uslot microstrip patch antenna for wlan and wimax. So we are comparing return loss, 3d gain plot, 2d gain plot and radiation pattern.
Dimensions for microstrip antenna for amateur radio application, which operates at the 5. Design and analysis of compact u slot microstrip patch antenna. Hfss tutorial 2microstrip patch antenna with a cutting slot. Multiband uslot microstrip patch antenna with defective. Design of double uslot multiband microstrip patch antenna. The proposed antenna is feed by the transmission line. Compared to conventional microstrip antennas or pifa antennas used for uhf rfid tags, the double loop inductive feed patch antenna has a planar structure, with no short via or short wall, which could decrease the manufacturing cost of the. Double loop inductive feed patch antenna design for antimetal. Abstract in this study, a 28ghz uslot rectangular microstrip patch antenna for 5g applications is proposed.
Single layer dual band microstrip patch antenna using. Analysis of double uslot cut rectangular microstrip antenna. Single layer dual band microstrip patch antenna using probe feed. Single u slot patch antenna is shown in figure 1a with the slot length approximately half wavelength long. 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. Bridged double uslot microstrip patch antenna for wireless. In this design two slots and one bridge elements have been applied to generate the three frequencies bands. The overall dimensions of the double uslot patch are. Parametric studies of antenna structure with double uslot, variation of feed position, and also with multiple layers are. The occurrence of the two resonant modes is mainly due to the embed ded reactive loading, which provides a capacitive load at the lower resonant frequency and. A dualband characteristic was obtained by using a double u.
The slot is said to introduce a mode near the fundamental patch mode when its length either equals half wave or quarter wave in. Modified double u slot penta band microstrip antenna for. A ushaped slot has been investigated in order to broaden the bandwidth of an antenna. In this paper, a modified double u slot planar microstrip antenna is designed, simulated and fabricated to operate at 2. Also, an lprobe is used to realize matching between the feed systems and radiating system in a wide frequency range. 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. Pdf in this paper, a design of double uslots microstrip antenna with triple. The next broadband antenna design to be simulated is a probefed, rectangular patch on a thick foam substrate with a cutout double u slot on it as shown in figure 7. The next broadband antenna design to be simulated is a probefed, rectangular patch on a thick foam substrate with a cutout double uslot on it as shown in figure 7.
Double loop inductive feed patch antenna design for. Design of triplelayer double uslot patch antenna for wireless. In this case, adding the ushaped slot in the patch enhances bandwidth by 33. What is the difference between slot antenna and patch antenna. A prototype antenna model is fabricated and tested using network analyzer. The uslot patch antenna structure consists of a patch, ushaped slot, a ground plane and coaxial feed lines. To analyze the dual band response at above frequencies, the resonance curve plots and surface current distributions for equivalent rectangular patch and single uslot and.
Double ushaped parasitic patch hslot loaded fed patch r 2. The dual u shape slot antenna is taken as the reference antenna in this paper, based on which the comparative studies are carried out, to bring an enhanced performance from it. Hfss tutorial 2microstrip patch antenna with a cutting slot coaxial feed how to cut slot in patch. The reference antenna is designed in hfss software, at. Thus, the antenna geometry has two most important considerations. A simple method to achieve the multi band characteristic in a micro strip antenna is embedding a slot in the patch. Mar 15, 2017 hfss tutorial 2microstrip patch antenna with a cutting slot coaxial feed how to cut slot in patch. Since the slot is thin, the voltage can be sinusoidal with zero voltage across the ends of slot. Pdf design of double uslot multiband microstrip patch antenna. Using double or dual slot stacked patch technique use can get better return loss by increases the length and width of slot antenna return loss can be reduced. Dual uslot loaded patch antenna with a modified lprobe feeding. Shape and size of the roundg plane and the return path 3 antenna types as described in the previous section, any conductor of length 4.
By gapcoupling ring patches along all the edges of proximity fed pair of slot cut ring patch, a 3. A dualband circularlypolarized doublelayer uslot microstrip patch antenna is proposed. Singlefeed circularlypolarized patch antenna types triangular microstrip antenna with uslot for 1. In this paper multi band characteristics are achieved by embedding number of ushaped slots on the rectangular patch. Multiband uslot microstrip patch antenna with defective ground base 11 d e fig. Patch antenna is actually a patch antenna placed over a antenna base. This paper presents the numerical simulation of double uslots microstrip patch antenna for wimax application. The current density on the surface vector jsurf used in the hfss of the double loop inductive feed structure and the radiation patch of the antenna is shown in figure 6. The quarter wave transformer matches the patch impedance with feed line impedance so maximum rf power is transformed to patch. Double ushaped slots loaded stacked patch antenna for. Analysis of slotloaded rectangular microstrip patch antenna. Bridged double u slot microstrip patch antenna for wireless communication rajneesh kumar patel1, mr. Figure 1 configuration of the double u slots patch antenna on a dielectric substrate. Slot antenna differs with patch antenna in many aspects.
The basics of patch antennas, updated orban microwave. Design of multiband uslot microstrip patch antenna for gsm. Single uslot patch antenna is shown in figure 1a with the slot length approximately half wavelength long. The uslot patch antenna was originally developed as a singlelayer, singlepatch wideband antenna. The antenna is printed on the substrate with high dielectric constant and simulated by hfss and the simulation results are discussed. The following table shows the substrate properties as well as the geometrical dimensions of the double u slot patch antenna. Hfss tutorial 2microstrip patch antenna with a cutting. The exact position along the resonant length is determined by the electromagnetic field distribution in the patch. The antenna geometry is fed with a coaxial line feed technique.
Pdf a double uslots microstrip antenna for triplebands operation. A dualband circularlypolarized double layer u slot microstrip patch antenna is proposed. The reported double u slot cut rectangular microstrip antenna yields dual and wide band operation in 2100 and 5400 mhz frequency bands. Figure 6 from double uslot microstrip patch antenna for wlan. The surface current of the antenna is also simulated by the hfss. A practical slot antenna is the cavitybacked slot antenna. In this paper a curved u slot triangular microstrip patch antenna is designed to operate at frequencies 5. Analysis of microstrip line feed slot loaded patch antenna.
A dualband uslot microstrip antenna with dualfeed and. The overall dimensions of the double u slot patch are. In this paper a curved uslot triangular microstrip patch antenna is designed to operate at frequencies 5. In this paper, a modified lstrip fed patch antenna is theoretically analyzed for wideband applications. A multiband triplelayer probe fed double u slot microstrip patch antenna for next generation wireless applications is proposed in this paper. A microstripfed slot antenna offers a better isolation between the feed and the material under measurement compared to the microstripfed microstrip antenna. This tutorial shows how to set up a waveguide port of a microstrip patch antenna in cst microwave studio 2010. Selection of feeding technique for a microstrip patch antenna is important decision because its affects the bandwidth,return loss,vswr patch size and smith chart. A multiband triplelayer probe fed double uslot microstrip patch antenna for next generation wireless applications is proposed in this paper.
The single ushaped slot is added based on a circuit theory concept to provide dualband broadband characteristics. The design and measured results of a rectangular u slot patch antenna proximity fed by a double. Broadband proximity fed ring microstrip antenna arrays. Different feeding methods also increase the antenna bandwidth such as proximity feed patch, asymmetric cpw fed patch antennas 10, 11. Double uslot loaded stacked microstrip patch antenna with 2. Sep 19, 2011 this tutorial shows how to set up a waveguide port of a microstrip patch antenna in cst microwave studio 2010.
Design and analysis of compact u slot microstrip patch. A slot planar patch antenna is designed, simulated and fabricated to operate at 2. Abstract this paper presents the numerical simulation of double uslots microstrip patch antenna for wimax application. Depending on the wavelength, the antenna can be as long as the fm antenna. Parametric studies of antenna structure with double uslot, variation of feed position, and also with multiple layers are presented. The u slot patch antenna is designed for increasing the bandwidth and return loss but gain cannot increase. Microstrip slot antenna microstip slot antenna is very simple in structure.
Design of double uslot microstrip patch antenna array for. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. In this paper, a multiband microstrip patch antenna with simple strip line feeding, which enables a handheld communicating device to. Sayeed abstractin this article, the parametric analysis of the slotloaded microstrip line feed patch antenna is investigated using arti. May 25, 2019 slot antenna differs with patch antenna in many aspects. 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 u shaped slot seldom exceeds 20% bw. Design of triplelayer double uslot patch antenna for. The previous page introducing slot antennas was primarily theoretical giving you an intuitive idea of how slot antennas work. The design of ellipticalpatch antenna with single uslot by using hfss software is shown above in figure 1 2. By using the slot, the dual band operation of the antenna can be achieved. Dual uslot loaded patch antenna with a modified lprobe. The multiband u slotted patch antennas are usually designed with complex feeding such as lprobe, mprobe feedings.
Double uslot rectangular patch antenna for multiband. A 28ghz uslot microstrip patch antenna for 5g applications. What is the difference between slot antenna and patch. Bridged double uslot microstrip patch antenna for wireless communication. Multiband u slot microstrip patch antenna with defective ground base 11 d e fig. The radiating patch is fed by a broadband electromagnetic coupling probe, known as lprobe. Tiny microstrip antenna covers wlan, lte, and wimax. The uslot patch antenna structure consists of a patch, u. Design of double u slot patch antenna a low profile double u slots antenna for wimax operation has low return loss and bandwidth. The following table shows the substrate properties as well as the geometrical dimensions of the double uslot patch antenna. In addition, the antenna has achievable return loss, radiation pattern and also bandwidths.