The pin diodes are used to connect main patch to four different sizes of small patches. A novel pattern reconfigurable dipoleyagi antenna for. Polarization reconfigurable wheelshaped antenna with conicalbeam radiation pattern research output. Expect for the polarization reconfigurable antennas, this paper also presents two pattern reconfigurable antennas that achieve switchable conicalbeam and broadside radiations. With a coaxial probe, two orthogonal resonant modes of the square patch antenna are simultaneously excited. A novel pattern reconfigurable dipoleyagi antenna design, simulation and measurement are presented in this paper. Polarization reconfigurable patch antenna listed as prpa. Ashish kumar sahu is a record of an original research work carried out by his during 20142015 under my supervision and guidance in partial fulfilment of the requirement for the. A simple design of circularlypolarized cp microstrip antennas with frequency agility is described.
These minima and maxima continuously change side like the phase of the rf signal. To improve the signal reception performance in multipath fading environment, the polarization reconfigurable antennas are considered. Bandwidth enhancement of microstrip patch antenna using. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. Antenna polarization, much like polarization with light, and nothing to do with arctic weather, and everything to do with the transmission and reception of electromagnetic radiation based on its orientation. Alternate feed methods a common variation in patch antenna design is the location and routing of the feed, to obtain a desired feedpoint impedance, to. In this paper, a compact frequency reconfigurable circular patch antenna with an arcshaped slot loaded in the ground layer is proposed for multiband wireless communication applications. Introduction reconfigurable antenna is an emerging area of research as it helps in increasing the system capacity and realizing multiple functions. Lukfrequency reconfigurable lowprofile circular monopolar patch antenna ieee trans antennas propag, 62 2014, pp. Accordingly it is expected that a wideband polarization recon.
Study of frequency and polarization reconfigurable on. A lowprofile frequency reconfigurable gridslotted patch. Forum for electromagnetic research methods and application. Numerical simulation is performed for the characteristics of the antenna with the software hfss. Some antennas are vertically polarised, others horizontal, and yet other antenna types have different forms of polarisation. When the equivalent capacitance values of the varactors are increased. Click here to go to our page on circular patch antennas new for september 2018. This paper introduces a polarization reconfigurable wheelshaped antenna with wide bandwidth and conicalbeam radiation pattern.
Single feed reconfigurable circularly polarized microstrip patch antenna feeding with proximity coupled method 40 5. Reconfigurable circular microstrip patch antenna with. When designing an antenna, deciding on a particular. This paper presents a wideband reconfigurable circularly polarized cp antenna with omnidirectional radiation pattern. Circular or linear polarized antenna for fpv oscar liang. Hi oscar, im trying to improve the wifi link and rc link on my q500 quad.
Design and simulation of reconfigurable monopolar antenna for. Vidmar, varactortuned microstrippatch antenna with frequency and polarisation. Tarricone department of innovation engineering university of salento via monteroni, lecce 73100, italy abstracta recon. Polarization inversion spin exchange at magic angle. A gridslotted patch with two tunable varactors is placed on the top layer, a microstrip line is placed in the middle of two substrates. Smith, reconfigurable aperture program recapmems revolutionary. Antenna polarisation is an important factor when designing and erecting radio antennas or even incorporating them into small wireless or mobile communications systems. The current distribution of an eshaped patch antenna in state 3 is shown in fig. Also the antenna gives nearly 3 db higher gain than that of monopolar circular patch 1. Shorting pins on the monopolar patch are used to obtain a wide impedance bandwidth. This patch can be dynamically reconfigured to radiate either a circularly polarized or dual linearly polarized radiation patterns. The fundamentals of patch antenna design and performance. Due to rapid growth of technology, the requirement of an antenna with less height for mobile phones contributes a huge challenge 1 2.
A wideband circularmonopolar patch surrounded by eight reconfigurable coupling loop stubs can generate conicalbeam. Eshaped patch antenna with reconfigurable circular. Keywords patch antenna, monopolar antenna, wifi, pin diode, reconfigurable antenna, hfss. By controlling the states of the pin diodes, the squarering microstrip antenna can radiate two complementary patterns conical. Antenna reconfiguration is enabled with the aid of two rf switches inserted in. Based on the proposed omnidirectional cp antenna, a polarization reconfigurable antenna was designed. Polarization reconfigurable wheelshaped antenna with. A wideband circular monopolar patch surrounded by eight reconfigurable coupling loop stubs can generate conicalbeam radiation patterns with different polarizations. Polarization reconfigurable antenna can change its polarization and the radiation pattern reconfigurable antenna can change its radiation pattern from one direction to another direction. By controlling the onoff states of the five pin diodes mounted on the arcshaped slot, the effective length of the arcshaped slot and the effective length of antennas current are changed, and accordingly six. A monopole antenna is a class of radio antenna consisting of a straight rodshaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane.
Frequency reconfigurable stepped impedance dipole antenna for. Tripleband reconfigurable lowprofile monopolar antenna. Wideband polarization and pattern reconfigurable antennas. Rectangular patch antenna for high gain and vertical polarization. Also the antenna gives nearly 3 db higher gain than that of monopolar circular patch1. The shorting walls are connected to each edge of the squarering patch through one pin diode. A novel polarization reconfigurable patch antenna with integrated mems actuators is presented for the first time. And the other set of shorting pins on the loop stubs. Rectangular patch antenna for high gain and vertical.
The basics of patch antennas, updated orban microwave. Parametric studies were conducted to illustrate the working principle of the proposed antenna. Microstrip antenna with an arc parasitic unit is analyzed, and a circular polarization reconfigurable microstrip antenna is designed. Mar 12, 2019 the antenna is based on a shorted monopolar patch surrounded by multiple curved branches and it is proximity. Due to their attractive advantages such as multiband function, steerable radiation patterns and polarization diversity, which can reduce the size, complexity, and cost of an antenna while improving the total performance of a radio frequency rf system, reconfigurable antennas have been studied intensively in recent years 1,2. The antenna is based on a shorted monopolar patch surrounded by multiple. Pin diode can be used to achieve reconfigurability by placing it within the slot. Lukfrequencyreconfigurable lowprofile circular monopolar patch antenna ieee trans antennas propag, 62 2014, pp.
Compact size, patch antenna, polarization reconfigurable, pin diodes. Radiation pattern can be well reconfigured by turning the pin diode switches on and off. Compared with the mpa without the crr, the bandwidth of the proposed antenna. The reconfigurable antenna is composed of a square radiating patch, four varactor diodes, and two lumped capacitors. The antenna consists of two stacked substrates and three metal layers. The results show that the frequency channels of the antenna are2.
The driving signal from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the lower end of the monopole. Frequency reconfigurable circular patch antenna with an. Introduction mobile communication has become an important part of our daily life. They are different from other antennas, as their mechanism of reconfiguration is located within the antenna and not controlled by an external beam. Design and simulation of reconfigurable monopolar antenna. For reconfigurable antennas, the potential is not to increase the performance of the antenna in a. Wideband polarization reconfigurable circularly polarized. The former one utilizes the combination of a wideband monopolar patch antenna and an lprobe fed patch antenna. Study of frequency and polarization reconfigurable on square. Tripleband reconfigurable lowprofile monopolar antenna with. Polarization reconfigurable patch antenna how is polarization reconfigurable patch antenna abbreviated. It allows switching between right hand circular polarization rhcp and left hand circular polarization lhcp.
It forms solution to the problem of changing in impedance, in which polarization diversity counter the effect of fading in communication. In order to obtain polarization reconfigurability, several patch antenna. This article proposes a reconfigurable lowprofile monopolar antenna with tripleband independent tuning capability. In this step the shortingvias are added along the width of the antenna only. With light polarization, a film or glass will appear darker, and block, light which is polarized in a certain direction, while allowing correctly polarized light. An additional resonance is introduced by the crr to broaden the bandwidth. Table 1 summarizes the polarization control and operation of the recon. This paper presents a novel lowprofile high gain frequency reconfigurable patch antenna with unidirectional radiation pattern by using a gridslotted patch with tunable varactors loading. Varying the patch size a reconfigurable monopolar patch antenna has been reported in 14, which capable to reconfigure up to eight different frequency bands using four pin diodes. Dual feed quadripolarization states microstrip patch. Recent developments of reconfigurable antennas for current. The structure based of yagiuda rationale consisting of director and reflector with four pin diodes operates at 2. A frequency reconfigurable dipole antenna with solidstate.
The antenna is based on a shorted monopolar patch surrounded by multiple curved branches and it is proximity. The antenna composes of a wideband monopolar patch and eight parasitic loop stubs. Antenna 1 includes a rectangular patch fed by a microstrip line and the ushaped slotted ground. A wideband circularmonopolar patch surrounded by eight reconfigurable coupling loop stubs can generate conicalbeam radiation patterns with different polarizations. Reconfigurable monopolar patch antenna researchgate. Vahldieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and wireless components letters, vol. Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e. Reconfigurable rhombus shaped patch antenna with yshaped feed for polarization. The antenna is based on the concept of a centerfed patch with shortings to achieve omnidirectional radiation patterns. A reconfigurable microstrip antenna for switchable polarization, ieee microwave and wireless components letters, vol.
The concept of reconfigurable antenna firstly appeared in d. Pentagon slot resonator frequency reconfigurable antenna. Instead of using vias, varactorloaded stubs are utilized to create reconfigurable equivalent shorting points. Within the extensive ambit of wireless communications, circularly polarized antennas can offer. The design schematic of this antenna is shown in fig. They are the original type of microstrip antenna described by howell in 1972. A microstrip antenna with the functions of switchable pattern and polarisation is presented. Schauberts patent frequencyagile, polarization diverse microstrip antenna and frequency scanned arrays in 1983. Frequency reconfigurable circular patch antenna with an arc.
Circularlypolarized conicalbeam patch antenna with wide. Jun 02, 2016 singlefeed circular microstrip patch antenna with diagonal slot for polarization reconfigurability has been proposed. In order to obtain polarization reconfigurability, several patch antenna configurations have been investigated 57. Frequencyreconfigurable microstrip patch antennas with. Pin diode can be used to achieve reconfigurability by placing it. All antennas in which frequency and radiation patterns can be modified in a reversible and controlled manner are known as reconfigurable antennas. A significant number of reconfigurable antennas incorporating switch, both switching in or out parts of the antenna structure and switching between external matching. By using complementary rhombus resonator crr, a smallsize and lowprofile microstrip patch antenna mpa with broad bandwidth has been proposed. This tunable hybrid can be used to feed a patch antenna via orthogonal slots etched in its ground plane. A frequency reconfigurable dipole antenna based on a silicon radiator is presented. The polarization reconfigurability is realized by introducing pin diodes on junctions between the patch and the branches to alter the current direction flowing on the branches.
A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. Frequency reconfigurable stepped impedance dipole antenna. The silicon radiator is activated with the aid of highly dense solidstate plasma by injecting carriers into the. The polarization reconfigurability is realized by introducing pin diodes on junctions between the patch and the branches to alter the. A lowprofile frequency reconfigurable gridslotted patch antenna. Cross section of a patch antenna in its basic form a half wave long patch operates in what we call the fundamental mode. The antenna is composed of a squarering radiating patch and four shorting walls. Polarization reconfigurable capability has been successfully added to a conventional eshaped patch antenna. Such antennas can facilitate multiple services in a compact. Polarization reconfigurable wheelshaped antenna with conical. Singlefeed circular microstrip patch antenna with diagonal slot for polarization reconfigurability has been proposed. The driving signal from the transmitter is applied, or for receiving antennas the output signal to the receiver is taken, between the lower end of the monopole and the ground plane. A reconfigurable monopolar patch antenna has been reported in 14, which capable to reconfigure up to eight different frequency bands using four pin diodes. The system i have is a itelite dbs phantom linear polarized antenna on my tx for both 2.