Study of a flexible low profile tunable dipole antenna using. The microstrip patch has a tuning range of 240 mhz over the frequency band of 1. A groundetched slot loaded with one varactor diode is tuned to be capacitive, resonant, or inductive. This section elaborates on the varactor diode that used in this antenna design using computer simulation technology cst and hfss ver. Moreover, the antenna without varactors is also simulated and fabricated as a reference. A dual mode tm 11 and tm 21 circular microstrip patch antenna combined with an annular ring is investigated for frequency tunability and polarization reconfiguration. Widely tunable multiband reconfigurable patch antenna for. Four varactor diodes are embedded along the nonradiating edges of the patch and a reverse dc bias is applied to change the tuning frequency. The two resonant frequencies and their ratio are functions of the capacitance value.
In 14, the resonant frequency of a coplanar patch antenna is tuned using a varactor component, which is placed over the radiating slot. An active high impedance surface for low profile tunable. In this paper, a tunable coplanar rectangular patch antenna cpa designed using a mems varactor is reported. An active high impedance surface for low profile tunable and. Frequency tunable antenna using a magnetodielectric. These structures implement tunable twopole bandstop. However by staking a parasitic patch on the driven patch. Tunable dualfrequency rf mems rectangular slot ring antenna. Several interesting approaches were presented by maddella et al. The series varactor tuned patch antenna configuration was the bandwidth enhancement method explored in this research. Using varactor diodes, the resonant frequency of the both modes is tuned from 1.
Frequency tunable dualmode microstrip patch antenna with. The operating frequency of a coplanar patch antenna is tuned using a varactor mounted at one of the radiating edges. Ningli zhu and wei zhang institute of microelectronics, peking university, beijing 100871, china. Apr 01, 20 it is proposed that a dualband slot antenna uses a single varactor to achieve tunability in only its second band of operation and has a fixed first band. A singleport uniplanar antenna with a builtin tunable filter is presented for operation in multiple lte bands for cognitive femtocell applications. The second application explored was to develop a polymer microsystem by the integration of a polymer mems device and organic electronics. Explore, through simulation and measurement, the possibility of dividing patch. A tunable coplanar patch antenna, a polymer mems based.
Other topologies 37,38 using varactor diodes are based on substrate integrated coaxialcavity resonators. In this paper, we present a coplanar patch antenna cpa made tunable using a mems varactor fabricated using printed circuit processing techniques. Most of these structures require a large number of active elements which translates into complexity of the biasing network and high cost for the tunable antenna. A novel printed antenna with a frequency reconfigurable feed network is presented. The transparent squareloop coplanar antenna is made of a mesh silver film printed onto a glass substrate. A monopole antenna and a microstrip feed line are printed on the same side of the dielectric substrate in this study, the rf35 substrate with thickness 0. Design of frequency reconfigurable multiband meander antenna using varactor diode for wireless communication i. Design of frequency reconfigurable multiband meander antenna. Design of memsbased tunable antennas, organic transistors. Since the varactor uses the coplanar waveguide cpw transmission line, tapered microstrip line between the. To achieve tunable resonant frequency, bandwidth and radiation pattern, the antenna is further loaded with coplanar waveguide cpw on which microelectromechanical system mems. Frequency tunable antenna for lte 4g handsets operating in the 2. Reconfigurable dualband patch antenna using varactorloaded slot.
An analytical model of active highimpedance surfaces was recentely presented by luukkonen et al. In a patch antenna the surface conductor element does not form the radiating element, as in other antennas dipole, monopole, etc. A small tunable antenna using multiple shorting posts and. Frequency reconfigurable circularly polarized slot antennas.
Huitema et al frequency tunable antenna using a magnetodielectric material for dvbh application 4457 a patch antenna. This diode functions as a variable capacitor varactor, which is used to adjust the effective length of the openend resonator in the coplanar patch antenna cpa. The 2nd one is a small patch antenna where the patch is shorted to the ground plane. A novel tunable stacked microstrip antenna is proposed in this paper, and the characteristics are simulated including a varactor diode loss. A memsbased tunable coplanar patch antenna fabricated. This diode functions as a variable capacitor varactor, which is used to adjust the effective length of. Through the research represented by this work, the properties of the series varactor tuned patch antenna, herein referred to as the fragmented patch antenna or fpa, were explored and optimized.
Specifically, the mems varactor located at one of the radiating edges capacitively loads the cpa. An open ring resonator orr loaded with a varactor diode is designed and implemented in order to achieve highperformance tunable bandstop filters in planar technology with a compact size. The return loss results of the antenna for various bias. Pcb memsbased tunable coplanar patch antenna request pdf. A simple varactortuned loop antenna matching network. Study of a flexible low profile tunable dipole antenna. A novel frequency tunable microstrip patch antenna using ferroelectric bst thin film varactor is presented. Added to this a good miniaturization is achieved by using the varactor diodes. The antenna consists of a bowtie structure patch radiating element in the inner space of an annulus that is on a nongrounded substrate with a ferroelectric fe barium strontium titanate bst thin film. Kawasaki and itoh 4 presented a slot tunable antenna loaded with reactive fet components. The proposed antenna consists of varactor diodes and f.
A memsbased tunable coplanar patch antenna fabricated using pcb processing techniques in this paper, a tunable coplanar rectangular patch antenna cpa designed using a mems varactor is reported. Hi, i was recently tasked to come up with a circuit diagram on how i would connect varactor diodes to my patch antenna so that i can tune the antenna electronically. Pdf the operating frequency of a coplanar patch antenna is tuned using a varactor mounted at one of the radiating edges. Sievenpiper reported a leaky wave antenna using tunable his 2. Both frequency tunability and polarization reconfigurability are controlled by a proposed feed network. A tunable triangular microstrip patch antenna is proposed for multiband applications in this letter. It is proposed that a dualband slot antenna uses a single varactor to achieve tunability in only its second band of operation and has a fixed first band. It can be seen that the operating frequency of the antenna is tunable from 4.
In this paper we show the procedure for obtaining both the tunability and the beam steering of the antenna by simply using one radiating element placed in near. Tunable coplanar patch antenna using varactor antenna radio. The resonant frequency of this reconfigurable antenna is controlled by tuning the. Widely tunable stacked microstrip antenna using varactor. In this paper, it has been connected to a coplanar waveguide cpw and a halfmode. It is found that the operating frequency of the slot antenna can be tuned by varying the capacitance values of four.
Tunable bandnotched cpwfed uwb monopole antenna using. This dissertation demonstrates a coplanar patch antenna made tunable by the use of a mems varactor. Tunable reduced size planar folded slot antenna utilizing. Frequency tunable antenna using a magnetodielectric material. The mems varactor is monolithically integrated with the antenna on duroid substrate. The antenna is based on a monopole microstrip patch fed by coplanar waveguide. The resonant frequency of this reconfigurable antenna is controlled by tuning the capacitance of the rf varactor which is used as part of the antenna feedline in this design.
A patch antenna loaded with varactor for multiband operation using fractals in reconfigurable antenna jyotika sawhney, gurpreet kumar the school of electronics and communication engineering, lovely professional university, phagwara, india abstract with the headway in the growth of the wireless communication over the past few. First, a coplanar waveguide cpw based patch antenna is integrated with a prepackaged diode. A reconfigurable coplanar waveguide bowtie antenna using. Trask, indoor loop antenna 1 february 2009 a varactortuned indoor loop antenna by chris trask n7zwy sonoran radio research p. Tunable coplanar patch antenna using varactor iet journals. However, none of the varactor tuned fss structures are placed very close to the antenna to provide tuning of the antenna in a low pro. It allows a shunt connection with different planar waveguide sections. Abstract in this paper, a tunable coplanar rectangular patch antenna cpa designed using a mems varactor is reported.
A new design approach for a microstrip patch antenna to achieve reconfigurable dualband operation with tunable frequency ratio is introduced. Optically transparent frequencyagile antenna for xband. Varactor tunable technique is one of the attractive solutions to extend the operating frequency range, which has motivated a variety of studies 710. A novel reconfigurable dualband patch antenna design using a varactor loaded slot has been proposed. Tunable coplanar and microstrip patch antennas have been reported 2. Abstract in this paper a varactorloaded antenna with a wide tuning range and good di rectivity is designed. This paper presents the design, fabrication, and measurement of a novel, tunable, dual frequency rectangular slot antenna using rf mems technology. Pcb memsbased tunable coplanar patch antenna semantic scholar. The antenna tuning is achieved by electrostatically actuated rf mems variable capacitors on a stub. As a result, an innovative patch antenna was produced that yielded 63. This thesis presents a tunable coplanar patch antenna, a polymer memsbased tunable bandpass filter, and a chipinpolymer packaging technology. A conductor backed coplanar waveguide patch antenna is chosen due to its suitability to mounted external tuning elements, using varactor diodes. The antenna is fabricated on rogers 6006 duriod with a dielectric constant and thickness of 6. Mar 15, 2016 a singleport uniplanar antenna with a builtin tunable filter is presented for operation in multiple lte bands for cognitive femtocell applications.
Varactor diode loaded reconfigurable patch antenna with. The frequency reconfigurability is achieved by using two pin diodes to couple or decouple a ring slot resonator filter from the antenna feed line. A frequency tuning range of 30% was obtained in the frequency range of 1. We have proved that the energy loss is relatively low when the working frequency is chosen to be away from the resonance frequency of the ishaped metamaterial. Tunable patch antenna using semiconductor and nanoscale. Varactor loaded patch antenna the varactor diode equivalent circuit is an important part in simulation of reconfigurable antenna in order to get the similar results with measurement.
A novel frequencytunable antenna with a wide tuning range. The design presented in this paper aims to combat the high profile and large size usually occur when designing antennas for low frequencies. The antenna provides a return loss better than 32 db in the tunable frequency range of 5. Utilize software simulation tools to optimize antenna parameters to develop such.
A compact frequency reconfigurable unequal uslot antenna. Wideband frequency tunable concentric circular microstrip. One is for a normal patch antenna in which the varactor diode is connected across the patch and the ground plane. This paper will focus on the miniaturization of a 3dshaped full band dvbh antenna with a high level of integration. Design and characterization of a tunable patch antenna. Tunable ishaped metamaterial by loading varactor diode for. A patch antenna with a varactorloaded slot for reconfigurable. A wideband frequency tunable concentric circular microstrip patch antenna with simultaneous polarization reconfiguration is demonstrated by using four varactor diodes between a circular patch and a concentric ring patch around it. Pdf tunable coplanar patch antenna using varactor researchgate.
Tunable coplanar patch antenna using varactor free download as pdf file. The small size of the antenna is achieved by the use of multiple shorting posts and varactor diodes. May 26, 2011 a tunable metamaterial by employing ishaped metamaterial with loaded varactor diode is presented in this paper and the phase of emitting wave modulated by the varactor diode is demonstrated. The proposed antenna is composed of two parts, one is the radiation part, and another is the coplanar waveguide feedline. Frequency tunable antenna for lte 4g handsets operating in. A memsbased tunable coplanar patch antenna fabricated using pcb. To the best of the authors knowledge this is the first. Other tunable antennas including tunable his based are reported in 1,318. An electrically small tunable antenna for use in mobile terminals is designed. Tunable bandnotched ultra wideband uwb planar monopole. They need many varactor diodes and their sizes are large. As the input impedance of the antenna can be varied by changing the bias voltage of the varactor diode on the f.
Tuning of fss structures is investigated using varactors in 69. The antenna design builds upon prior related work on rigid substrates that used a square patch fss loaded with varactors 7, 8. Reconfigurable coplanar waveguide cpw and halfmode. A coplanar patch antenna with a single varactor diode. Tunable coplanar patch antenna using varactor researchgate. The gain is low at large capacitance of the varactor.
In 2, the operating frequency of the microstrip patch antenna was tuned by using a varactor diode at both radiating edges. Reconfigurable dualband patch antenna using varactor. Design and characterization of a tunable patch antenna loaded. A memsbased tunable coplanar patch antenna fabricated using. Multiple shorting posts are used to allow a greater freedom in the placement of the probe feed. Tunable coplanar patch antenna using varactor antenna. The bowtie patch is fed by a coplanar waveguide cpw transmission line that also includes a cpwbased bst. An increase in the effective length decreases the resonant frequency of the cpa and vice versa. Box 25240 tempe, az 852855240 senior member ieee email. The antenna is based on coupledmode patch antenna cmpa 1 that is capable to scan the beam as the function of frequency. An active highimpedance surface for lowprofile tunable. Tunable coplanar patch antenna using varactor abstract. In this paper, the design and characterization of a tunable patch antenna loaded with complementary split ring resonators csrrs on the patch have been realized. The performance of an optically transparent and frequencyagile antenna operating from 8.
Pcb memsbased tunable coplanar patch antenna semantic. In 8 a wide tuning range is also achieved by using varactor diodes in a large ground plane to cover the frequencies between1. Two varactor diodes placed in line with the shorting posts are used to further decrease the size of the antenna. Abstract a tunable folded slot antenna that utilizes varactor diodes is presented. The approach uses a lumped capacitor in the middle of a slotted patch antenna, which results in two resonant frequencies. The mems varactor is monolithically integrated with the antenna on duroid.
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