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This paper investigates a novel multi-segment dielectric resonator antenna (DRA). The antenna consists of a thin segments of different permittivity material bonded to the underside of a rectangular dielectric resonator segment. The multi-segment DRA element is excited by a microstrip line. The permittivity and thickness of the segments are used to concentrate the fields of the micro-scrip line and...
The dual-polarized patch element is useful in indoor wireless networks for broad bandwidth and modest gains. The focus of this paper is placed on an inset matching network used with a patch element. The purpose of the design is to increase the bandwidth of a microstrip patch by using a thicker substrate with low dielectric constant. However, with such a combination, the input impedance of the antenna...
The stacked quad EMC super patch with probe feeding was first proposed in [1] and a number of design results for personal communication terminals were provided in [2]. It has wide bandwidth of stacked microstrip antennas and higher gain due to the radiation of subarray. On the other hand, aperture coupling[3] can reduce the interaction between the antenna and feeding network, and the feed can be placed...
A new ring coupled triangular microstrip antenna has been investigated experimentally. The measured bandwidth of the proposed antenna is obtained 309 MHz (7.14% at fo = 4.33 GHz), which is 4 times the band width of the corresponding triangular patch antenna. The gain of the antenna is 3 dB and cross polar level is better than 12 dB within the impedance bandwidth of 7%.
A Broadband Microstrip U-slot antenna with improved impedance bandwidth has been presented. The measured impedance bandwidth of a reflection coefficient in −10dB ranges from 1.22 to 3.77 GHz and thus covers most of the commercial wireless communication systems, such as SDAR(2.32–2.35) GHz, WLAN(2.4–2.5) GHz, PCS(1.8–2.0) GHz. To achieve compact size the square patch is embedded with a U-slot, and...
In this paper, the design of circular microstrip patch antenna with sandwiching the substrates has been proposed for bandwidth enhancement. The proposed antenna is designed at 2.7GHz (S-band) using High Frequency Structural Simulator. The circular patch antenna is designed on two different substrates, FR4_epoxy and RT Duroid 5880™ and fabricated on the three layer FR4-epoxy substrate. The effect of...
The design of high antennas for wireless communication is very essential. The main drawback of the microstrip patch antenna is the low gain. The Metamaterial superstrate layer along with antenna structure improves the antenna performance parameters like gain and bandwidth. Due to Ultra refraction phenomenon, radiation is concentrated normal to the patch so that unwanted sidelobes can be avoided. This...
Modern communication devices supports higher bandwidth applications. So the antenna required for such applications should have wider bandwidth and should be smaller in size. Being easy to fabricate, low volume and inexpensive microstrip patch antenna is widely used for wireless communication applications. But disadvantages like low gain, narrow bandwidth, etc. limits the performance of microstrip...
In this paper a new antenna design using coplanar waveguide (CPW) suitable for Ultra Wide band (UWB) communication. It consists of two ground planes etched on the both side of the radiator. A ground plane having the slot structure. i.e. partial ground. By using a circle shaped radiator with rectangular cut provides much impedance bandwidth. This antenna has a better return loss less than -10 dB for...
This paper presents a U Shaped micro strip antennas with improved bandwidth operate at 3.8GHz. The proposed antenna will be in light weight, smart and compact unit compare with consists of metallic patch and ground between which is a dielectric medium called the substrate. The Proposed antenna also presents the detail steps of designing the U shaped micro strip antenna and the simulated result. U...
Bandwidth reconfigurable microstrip rectangular patch antenna with operating frequency (ƒc), 5.8 GHz has been presented in this paper. Network morphing method has been used to achieve reconfigurability. The bandwidth (BW) of the antenna varies from 107 MHz to 153 MHz i.e. a bandwidth variation of 46 MHz at almost constant frequency is observed. The VSWR achieved in this structure is 1.19. All this...
A microstrip patch antenna array with low-side lobe level, high gain and broadband is presented in this paper. A microstrip patch with one parasitical patch is proposed as a radiation element, and the antenna array is composed of 8×8 radiation elements. Then Chebyshev current distribution is used to design the feeding network on H-plane. The simulated results by CST Microwave Studio software indicate...
Gain characteristics improvement of a broadband circularly polarized patch antenna using artificial ground structure is studied. The antenna has a simulated S11 bandwidth of 48.6% and axial ratio bandwidth of less than 3dB of 21.2%. However, gain characteristics of boresight direction decreases in the frequency range of 5.5GHz. In this paper, by modifying shapes of the ground plane, we attempted to...
A broadband circularly polarized patch antenna is proposed for WLAN system application. Seven identical curved branches extended from the circular patch are designed to generate circular polarization. Simultaneously, seven identical slots are symmetrically etched on the junction of each curved branch and the circular patch. The dimension of the antenna is reduced by 17.8% compared with no slots. The...
A novel circularly polarized (CP) circular antenna for UHF RFID system is proposed and experimentally studied. By embedding a four-leaf clover slot into the circular patch fed by the L-shaped microstrip line, the proposed CP design can easily be achieved with the impedance bandwidth (RL L 10 dB) of about 99 MHz (11.0% @ 925 MHz) and the 3 dB axial-ratio (AR) bandwidth of about 60 MHz (7 % @ 925 MHz)...
An SIW cavity-backed dual loop antenna with broadband and circular polarization (CP) operation at Ka band is presented. The dual loop is on the top metal layer of the SIW and is coupled-fed by a longitudinal slot which is on the bottom metal layer. A microstrip-SIW transition is designed as the feed structure. Simulation results show that the antenna has a common bandwidth of 11.1% from 34 to 38 GHz...
Microstrip patch antennas are widely used in various wireless applications such as Wireless local area network (WLAN). WLAN is capable of providing maximum data transfer rate of 600 Mbps. The proposed antenna design has a slotted H-shaped patch and dumbbell (H) shaped Defected Ground Structure (DGS) on Flame Retardant-4 (FR-4) substrate with the microstrip feeding technique which radiates at 2.4GHz...
The modern wireless communication systems require large bandwidth, high gain and small size antenna's with the purpose of providing enhance the performance over a broad range of frequencies. Due to this requirement direct to design a Microstrip rectangular patch antenna. The proposed design of microstrip antenna is reported, which is increased the bandwidth of microstrip patch antenna by cutting part...
Improvement in gain as well as bandwidth of microstrip antenna using reactive impedance surface and Fabry Perot cavity resonator is proposed. Suspended microstrip antenna (MSA) is designed on reactive impedance surface (RIS) backed FR4 substrate. RIS improves bandwidth, gain and efficiency of antenna due to reduced coupling between MSA and ground plane. This MSA backed RIS is placed in a FPC resonator...
The microstrip antennas with symmetrical comb-shaped radiator are considered. The influence of depth of the cuts on main electrical characteristics of four- and eight-comb antennas is researched. The resonance frequency, the bandwidth and reflection coefficient are chosen as characteristics. The graphs of unknown dependencies are constructed for the two basic frequencies.
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