Antenna design the antenna design of the proposed antenna is shown in fig. A single probefed reconfigurable monopolar patch antenna with frequency diversity is presented. The antenna consists of two stacked substrates and three metal layers. Introduction mobile communication has become an important part of our daily life. Highagain polarizationareconfigurable monopole antenna for.
A cylindrical phantom is considered to know the effect of the antenna when it is close to the muscle at 2. Jan 01, 20 a novel reconfigurable log periodic patch array has been proposed by inserting switches within the aperture slots coupling the patches to the feed line. Polarization reconfigurable antenna, circular patch. First, a wideband monopolar patch and a lprobe fed patch were organically integrated together to achieve a wideband 2. A pin diodebased multiband reconfigurable printed monopole antenna for.
This paper presents a wideband reconfigurable circularly polarized cp antenna with omnidirectional radiation pattern. By switching pin diodes on or off, the proposed antenna can operate in either monopolar. Eight varactor diodes are used to bridge the gaps between the. Reconfigurable patch antenna radiations using plasma faraday shield effect oumar alassane barro, mohamed himdi, olivier lafond. A singlefeed reconfigurable squarering patch antenna with pattern diversity is presented. A novel pattern reconfigurable dipoleyagi antenna for. This paper presents a compact sensingcommunicating antenna configuration for interweave cognitive radio cr systems. Here, our work was to carefully associate the previously designed quasilumped hybrid coupler and a patch antenna resonating at 3.
They are different from other antennas, as their mechanism of reconfiguration is located within the antenna and not controlled by an external beam. Tripleband reconfigurable lowprofile monopolar antenna with. Radiation pattern reconfigurable antenna for wban and. The proposed antenna has a rectangular patch with two shorting pins. Reconfigurable monopolar patch antenna electronics.
With a coaxial probe, two orthogonal resonant modes of the square patch antenna are simultaneously excited. Eight varactor diodes are introduced to bridge the gaps between the. In wireless communication systems the actual transmission of signals over air is carried out by antenna systems. The antenna is based on the concept of a centerfed patch with shortings to achieve omnidirectional radiation patterns. Another frequency and pattern reconfigurable antenna with combined monopole and patch antennas was proposed in 60. This polarization reconfigurable characteristic is realized by controlling pin diodes on the coupling loop stubs. Compared with the mpa without the crr, the bandwidth of the proposed antenna. A novel frequency reconfigurable antenna is presented based on a circular monopolar patch antenna. Due to rapid growth of technology, the requirement of an antenna with less height for mobile phones contributes a huge challenge 1 2. Four open stubs are attached to the rectangular patch through four pin diodes, and the ability of switching the antenna operating frequency is achieved by using dual inline package switches to control the states of the. Wideband polarization reconfigurable circularly polarized. The antenna consists of a circular radiation patch, a circular feeding patch and five shorting posts in which four shoring posts are connected to the ground via pin diodes. Reconfigurable monopolar patch antenna electronics letters. Graphenebased yagiuda antenna with reconfigurable radiation.
A pattern reconfigurable dipoleyagi antenna is presented in this paper. Measuring radiation patterns of reconfigurable patch antennas on wafers tests can be performed relatively inexpensively and without sawing wafers. And in 5, a continuously tunable frequency reconfigurable antenna based on a circular monopolar patch antenna using varactor is presented. Based on the proposed omnidirectional cp antenna, a polarization reconfigurable antenna was designed. Frequency reconfigurable antenna is a possible candidate to improve the problem.
A compact integrated uwbreconfigurable microstrip antenna. A miniaturized reconfigurable crlh leakywave antenna using. In addition, the frequency reconfigurable antenna has other advantages over the wideband antenna, such as smaller size and more stable radiation pattern. A lowprofile frequency reconfigurable gridslotted patch. The silicon radiator is activated with the aid of highly dense solidstate plasma by injecting carriers into the. For the novel frequency and pattern reconfigurable yagiuda patch antenna detailed in. A wideband mode and three narrow band modes of reconfiguration are demonstrated, when groups of patches were selected within the array.
The antenna can be reconfigured to change the main beam pattern into two or four different radiation directions. Design and simulation of reconfigurable monopolar antenna. Reconfigurable squarering patch antenna with pattern. Keywords patch antenna, monopolar antenna, wifi, pin diode, reconfigurable antenna, hfss.
Parametric studies were conducted to illustrate the working principle of the proposed antenna. Design of frequencyagile microstrip antennas with conical. Reconfigurable antennas and rf components at millimeter. A frequency reconfigurable patch antenna is 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. The antenna structure has four shorting walls placed respectively at each edge of the squarering patch, in which two shorting walls are directly connected to the patch and the others are connected to the patch via pin diodes. Reconfigurable antennas are an integral part of such systems as they can control polarization, frequency, radiation pattern, or characteristic.
Eight varactor diodes are introduced to bridge the gaps between the circular patch and the sectorshaped patches. Figure 10 radiation pattern this antenna is also designed to support the frequency range from 0hz to 10ghz and. A progression of parametric study was done to get that how the features of the antenna depends on dimensions and material of geometry. Reconfigurable patch antenna radiations using plasma faraday. Luk, frequencyreconfigurable lowprofile circular monopolar patch antenna. In this paper, a new pattern reconfigurable microstrip uslot patch antenna using eight pin diodes is proposed. The proposed frequency reconfigurable antenna is based. The shorting walls are connected to each edge of the squarering patch through one pin diode. 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. Moreover, the radiation patterns of the proposed antenna are stable in each operating band. Four open stubs are attached to the rectangular patch through four pin diodes, and the ability of switching the antenna operating frequency is achieved by using dual inline package switches to control the states of the diodes. The proposed antenna has two layers and an active element varactor diode installed.
A low profile pattern reconfigurable antenna with enhanced. Four open stubs are attached to the rectangular patch through four pin diodes, and the ability of switching the antenna operating frequency is achieved by using dual inline package switches to control the states of the diodes, whereby eight different operating bands over a wide range of frequencies can be switched. The antenna structure has four shorting walls placed respectively at each edge of the squarering patch. In addition, the antenna yields narrow bandwidth with minimum variation in gain, hence used for 4g and 5g technologies. 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. For reconfigurable antennas, the potential is not to increase the performance of the antenna in a. Frequencyreconfigurable lowprofile circular monopolar. Frequency reconfigurable circular patch antenna with an. Tripleband reconfigurable lowprofile monopolar antenna. A microstrip antenna with the functions of switchable pattern and polarisation is presented.
Stable monopole like radiation patterns are achieved at all operating frequencies. Pattern reconfigurable techniques for lp and cp antennas with. Mar 12, 2019 this paper presents a wideband reconfigurable circularly polarized cp antenna with omnidirectional radiation pattern. A frequency reconfigurable dipole antenna with solidstate. By using complementary rhombus resonator crr, a smallsize and lowprofile microstrip patch antenna mpa with broad bandwidth has been proposed. Reconfigurable squarering patch antenna with pattern diversity. Recent developments of reconfigurable antennas for current and.
This paper presents a radiation pattern reconfigurable yagiuda antenna based on graphene operating at terahertz frequencies. A pin diode between the patch radiator and the embedded corner segment switches the frequency between 5. Bandwidth enhancement of microstrip patch antenna using. An electrically small cpw fed frequency reconfigurable. An electrically small cpw fed frequency reconfigurable antenna. All antennas in which frequency and radiation patterns can be modified in a reversible and controlled manner are known as reconfigurable antennas. A novel frequencyreconfigurable antenna is presented based on a circular monopolar patch antenna. By switching pin diodes on or off, the proposed antenna can operate in either monopolar patch or normal patch mode in similar frequency ranges. Reconfigurable monopolar patch antenna ieee xplore. Design and analysis of microstrip patch antenna using. Frequency reconfigurable stepped impedance dipole antenna for. The antenna has distinct monopolar and broadside radiation patterns at its lower and upper bands, respectively, and a previous realization only allowed simultaneous tuning of the.
Eight shorting posts are implemented around the patch to change the operating mode of the antenna from monopolar patch mode to normal patch mode. Switchable linearly polarized broadside and conical radiation patterns are achieved by systematically integrating a wideband lowprofile monopolar patch antenna with a wideband lprobe fed patch antenna. Forum for electromagnetic research methods and application. 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. The yagiuda antenna is a typical endfire antenna composed of the radiation and parasitic elements, which has been widely adopted for tv signal reception. Measuring radiation patterns of reconfigurable patch antennas. An antenna can be defined as a transducer between a guided wave propagating in a transmission line and an electromagnetic wave propagating in free space or an unbounded. In addition, the two modes are designed to resonate in similar frequency ranges. 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. An additional resonance is introduced by the crr to broaden the bandwidth. Lukfrequency reconfigurable lowprofile circular monopolar patch antenna ieee trans antennas propag, 62 2014, pp.
A simple design of circularlypolarized cp microstrip antennas with frequency agility is described. A pin diode based multiband reconfigurable printed monopole antenna for. Design and simulation of reconfigurable monopolar antenna for. A frequencyreconfigurable dualband lowprofile monopolar. A lowprofile frequency reconfigurable gridslotted patch antenna. The existence of passive element proven that pattern reconfigurability is achieved when radiation pattern is reflected by the reflector and operates at 2. The objective of work is to design and develop polarization reconfigurable microstrip patch antennas which radiate electromagnetic wave of various orthogonal patterns i.
A wideband circularmonopolar patch surrounded by eight reconfigurable coupling loop stubs can generate conicalbeam radiation patterns with different polarizations. It is fed by only a single feeding port, and the parasitic element is excited by means of electromagnetic coupling of the dipole antenna. The patch antenna is therefore a voltage radiator, as opposed to the wire antennas, which radiate because the currents add up in phase and are therefore. In, a reconfigurable patch antenna design with dualprobe coupler feed network was presented. Pattern reconfigurable techniques for lp and cp antennas. The fundamentals of patch antenna design and performance. 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. Wideband patternreconfigurable antenna with switchable. The reconfigurable antenna is composed of a square radiating patch, four varactor diodes, and two lumped capacitors. A miniaturized reconfigurable crlh leakywave antenna. By controlling the states of the pin diodes, the squarering microstrip antenna can radiate two complementary patterns conical. The antenna comprises of a centerfed circular patch surrounded by four sectorshaped patches. The antenna is based on a shorted monopolar patch surrounded by multiple curved branches and it is proximity. Reconfigurable monopolar patch antenna researchgate.
Radiation and antennas name name name introduction. When the equivalent capacitance values of the varactors are increased. A wideband circular monopolar patch surrounded by eight reconfigurable coupling loop stubs can generate conicalbeam radiation patterns with different polarizations. Monopolar patch antenna,ieee transactions and propagation,vol. Measuring radiation patterns of reconfigurable patch. Frequency reconfigurable stepped impedance dipole antenna. Jan 01, 2018 the reconfigurable antenna solution is thus preferable with respect to a phased array antenna mainly because. The sensing antenna is an ultrawide band uwb planar monopole antenna, while the communicating antenna is a reconfigurable microstrip antenna etched on the backside of the uwb antenna radiating patch. Reconfigurable antennas and rf components at millimeter wave reconfigurability is a vital feature of future agile millimeter wave systems for sensing, imaging, wireless, and satellite communications. Recent advances in reconfigurable antennas at university of. A gridslotted patch with two tunable varactors is placed on the top layer, a microstrip line is placed in the middle of two substrates. Besides the simple structure, yagiuda antennas have the potential to be designed as pattern. A frequency reconfigurable dipole antenna based on a silicon radiator is presented.
Frequency reconfigurable circular patch antenna with an arc. The microstrip antennas radiation arises from the fringing fields, which are due to the advantageous voltage distribution. The antenna is composed of a squarering radiating patch and four shorting walls. Measurement results show that the lowprofile reconfigurable monopolar antenna achieves two independent tunable bands, with 10dbtuning ranges of 31% and 22% centered at about 0. Based on the circular shape of the substrate and the radiation patch, the slot in. This paper introduces a polarization reconfigurable wheelshaped antenna with wide bandwidth and conicalbeam radiation pattern. The reconfigurable antenna solution is thus preferable with respect to a phased array antenna mainly because. The radiation pattern reconfigurable component is composed by deploying a pin diode between two passive elements.
Because of the advantages of low biasing voltage, high tuning speed 1100 ns, high power handling capability, high reliability, and extremely low cost, pin diodes based frequency reconfigurable antenna. A circular monopolar patch antenna, fed from center and surrounded by four sectorshaped patches, is presented in 2. Monopolar patch antenna has been extensively studied because of its monopole like radiation patterns and its lowprofile structure less than 0. 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. Recent developments of reconfigurable antennas for current. This article proposes a reconfigurable lowprofile monopolar antenna with tripleband independent tuning capability. Signals will be sent by the network analyzer to the transmitting vertical antenna.
Polarization reconfigurable wheelshaped antenna with conical. The proposed antenna consists of a driven dipole radiation conductor, parasitic strips and embedded graphene. The antenna also shows consistent radiation patterns at all the reconfigured frequency. Frequencyreconfigurable microstrip patch antennas with. A wideband, patternreconfigurable antenna is reported that is, for example, a good candidate for ceilingmounted indoor wireless systems. An electronically reconfigurable patch antenna design for.
Reconfigurable monopolar patch antenna iet journals. Conclusions a novel polarization reconfigurable patch antenna with integrated mems actuators is presented for the first time. Reconfigurable patch antenna radiations using plasma. Polarization reconfigurable wheelshaped antenna with. Instead of using vias, varactorloaded stubs are utilized to create reconfigurable equivalent shorting points. A reconfigurable monopolar patch antenna has been reported in 14, which capable to reconfigure up to eight different frequency bands using four pin diodes. This paper presents two pattern reconfigurable techniques to realize linear lp and circular cp broadside and conicalbeam switchable radiation patterns from a single antenna.
Lukfrequencyreconfigurable lowprofile circular monopolar patch antenna ieee trans antennas propag, 62 2014, pp. In addition, the antenna owns a lowprofile structure 0. A wideband circularmonopolar patch surrounded by eight reconfigurable coupling loop stubs can generate conicalbeam. Frequencyreconfigurable lowprofile circular monopolar patch antenna. The measured e and hplane radiation patterns for the vertical polarization are shown in fig. Similar radiation patterns are observed for the horizontal polarization. In this paper, a compact frequency reconfigurable circular patch antenna with an.