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This paper presents a U-shaped stub fed with coplanar wave guide (CPW) line and microstrip line to achieve ultra-wideband characteristics. Two kinds of antenna prototypes are designed, fabricated and measured. A1: CPW-fed U-shaped stub placed in a rectangular wide slot and A2: microstrip line fed U-shaped open stub. Both the antennas are designed on FR4 Epoxy substrate of thickness 1.6mm. Simulated...
In this paper, a new compact spectacles shaped patch UWB antenna using a microstrip fed line is proposed. The new design is consist of a spectacles shaped patch along with tapered slot ground plane.The proposed antenna has a compact electrical dimension of 0.24 λ × 0.21 λ × 0.016 λ and fed with a 50-ohm microstrip transmission line. Computer Simulation Technology (CST) based on finite-difference time-domain...
In this article a microstrip antenna is reported for wideband wireless communication application. The main radiator of this design is printed in the front side of a piece of FR4 dielectric substrate while a finite ground plane is etched on the rear side. To achieve wide operating band, the ground plane is reduced to partial one and defected by inserting slots on its upper edge. It is found that this...
In this paper, we present the simulated design of a dual-polarized H-shaped aperture-coupled microstrip antenna for ultra-wideband radio frequency identification (UWB-RFID) applications. The antenna has a compact design (30 × 30 × 6.9 mm3) with a hybrid structure. The feed portion is on a Ferro A6M low-temperature co-fired ceramic (LTCC) substrate, while the square patches are deposited onto Rogers...
The radiation performance of a circularly polarized (CP) single probe-fed truncated corner square microstrip patch has been enhanced by employing (i) a metal (PEC) ring contouring the patch on the patch side of the CP antenna, and (ii) a multi-section ring defect in the ground plane (GP) of the CP antenna. The concept has been validated by designing a CP patch with a conventional GP, a CP patch with...
A modified square patch antenna, for WiFi applications, operating at 5.5 GHz, is proposed in this article. A complementary square open loop resonator, having the resonance frequency at the upper 3 dB frequency of the patch resonance, is introduced on the patch to enhance the bandwidth more than twice that of the conventional square patch antenna operating at the same frequency. The concept of introducing...
The need to high frequency applications with small packaging require to use microstrip and printed antenna with developing technique to go forward with advanced technology today. Miniaturization usually comes at a price of reduced bandwidth, in this paper; the bandwidth enhancement techniques for microstrip antenna is presented with a major emphasis on the recent trends of minimization techniques...
A microstrip line-fed slot antenna is presented in this paper to operate in the entire 4G/LTE band. The slot antenna has the letter ‘L’ shape, and when excited with a transmission line generates multiple modes. These modes are combined to obtain the large bandwidth for covering most of the 4G/LTE band. Several feedlines have been studied to enhance the bandwidth. The slot width is also varied to achieve...
A Multiband microstrip antenna for Industrial, Scientific and Medical Band (ISM Band) application is proposed in this paper which have a working frequency at 902 – 928 MHz, 2400 – 2480 MHz and 5150 – 5350 MHz. The antenna design uses FR4 substrate with a relative dielectric constant 4.4, thickness 0.8 mm and has a simple structure with small size of 32×72 mm2. The simulation result showed impedance...
A novel Flaps antenna for W-band application is proposed in this paper, it can reach a wider bandwidth compared with the conventional reflectarray antenna. The structure of this antenna element is slotted square ring combined cross ring, this new element can get a bigger range of phase variation, which leads to wider bandwidth for the Flaps antenna, and a linear Flaps antenna operating at 94 GHz is...
In circularly polarized radiation, the rotational orientations of the transmitter and the receiver antennas are unimportant in relation to the received signal strength. In this paper, a center square slot cut elliptical patch microstrip antenna to realize a tunable circular polarization in 1000 MHz frequency band is proposed. It yields axial ratio bandwidth of nearly 1.2% over tunable range. A rectangular...
The paper describes the analysis of the efficiency of the new technique of miniaturization of microstrip devices applied to the branch-line coupler design. The method is based on the replacement of transmission line segments of the coupler with the lowpass filters with the same phase response, which allows significant device size reduction. There are in the paper four designs of compact branch-line...
In this paper, a novel wide band stacked segment microstrip patch antenna (MPA) with two layered RT/Duroid is proposed. Multi-layered stacked patches are designed with rectangular dimensions, and square slots are entrenched with first patch to excite them. A parametric study of dielectric thickness and stacked center is carried out to enhance the impedance bandwidth of the proposed antenna. The antenna...
A compact, tuning-fork, microstrip-fed monopole antenna and a classical triangular patch antenna operating at 5.5 GHz for WiMAX and 5.2/5.8 GHz for WLAN and ISM are presented. The antenna fork features an arm with a slit, which improves the gain by 12% compared with fork antenna without slit. The antenna offers 1 GHz, 2:1 VSWR bandwidth. The proposed antenna has a compact size of 21 mm × 13 mm, resulting...
Dielectric Resonators are being used as antennas in wireless communication systems presently due to advantages over microstrip like low loss particularly at higher frequencies. Also with ever increasing demand for bandwidth, wide banding has become one of the prime goals of antenna design. DRA wide banding can be done using stacking. Some literature are already available for stacked DRA with simulated...
Two CPW fed band-notched antenna are presented. In the first antenna by using four CSRRs(Complementary Split Ring Resonators) and a MLs(Meander Lines) on the patch and the feed line, band notched features are obtained in 5.4 GHz–6.5 GHz for WLAN, 7.2 GHz–8 GHz for partial C-band and 8.5 GHz–10.4 GHz for X-band. The presented antenna consists of a square patch which has four CSRRs in four different...
This work investigates microstrip patch antennas on composite printed circuit boards in terms of their radiating performance, manufacturing techniques and tolerances, structural and thermal properties. The objective is to validate that the designs are capable of offering stable performance, whilst providing high structural strength with significantly low mass. The results are compared with the ones...
A comparison between corporate fed microstrip antenna array (MSAA) and an electromagnetically coupled microstrip antenna array (EMCP-MSAA) at Ka-band is presented. A low loss feed network is proposed based on the analysis of different line widths used in the feed network. Gain improvement of 25% (1.5 dB) is achieved using the proposed feed network in 2×2 EMCP-MSAA. A 8×8 MSAA has been designed and...
A coplanar waveguide (CPW) — fed compact cupcake shaped printed antenna is proposed for UWB applications. Cupcake structure is formed by capping an ellipse (eccentricity = 0.95) over a semicircle (radius = 12mm). The bandwidth is enhanced by loading an ellipse over the semicircular patch and using CPW ground plane. The antenna parameters are simulated and optimized using Ansoft HFSS electromagnetic...
Microstrip patch antenna has extensive applications in areas requiring light weight and low profile antenna sub system. Differential Evolution (DE) algorithm and Cuckoo Search (CS) algorithm are modern optimization algorithms used here for determining the design parameters of microstrip antenna. In literature, there does not exist any direct relation between the bandwidth of a microstrip patch antenna...
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