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A linearly polarized (LP) metaline radiates a back-broadside-forward (BBF) scanning beam, where the broadside beam appears at a specific frequency. In contrast, two LP metalines excited in balanced mode form a broadside beam across a wide frequency band. This double metaline system has a gain bandwidth of 31% for the LP broadside radiation. Similar wide-band operation is realized for a circularly...
The Theory of Characteristic Modes is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this paper, the resonant behavior of different excitation feed probes are analyzed using...
In this contribution, we propose a new reconfigurable unit-cell design operating in circular polarization in Ka-band. Two p-i-n diodes are integrated in order to achieve a phase resolution of 1 bit (0°/180° are the possible phase states). An insertion loss of about 1 dB at 29 GHz with a 3-dB relative bandwidth of 14.5% has been numerically demonstrated.
The design, fabrication and characterization of a 2×8 patch antenna array operating in the IEEE 802.11ad frequency band (57–66 GHz) is presented. The design is based on two-layer structures, where the radiating patches placed on top substrate are fed by conductor backed coplanar waveguide (CPW)-fed loop slots, which are placed on the bottom substrate. The top layer is formed by using a low-cost pyrex...
In this paper, the design of Half-Mode Substrate Integrated Waveguide (HMSIW) fed dual frequency microstrip patch antenna has been presented. The proposed antenna is designed using two microstrip patches such that it resonates at two frequencies 9.95 GHz and 11.35 GHz which are used for X-band applications. The HMSIW is excited to generate dominant TE10HM mode. Two patches are used as a radiating...
This paper presents a novel design of simplified, low cost and lightweight mode reconfigurable cubic patch antenna that is designated to operate around 2.4 GHz for the applications of GSSP, WLAN/Bluetooth/WiBree/ZigBee, LTE, DMB and wireless routers. When this antenna is unfolded, it radiates omni-directionally at 2.4 GHz with a bandwidth (S11< −10 dB) of 450 MHz (2.3 GHz–2.75 GHz); while when...
The Theory of Characteristic Modes is proposed as a systematic approach to antenna design to achieve the goal of finding the antenna structure with optimum broadband behavior. This theory provides a physical insight to the radiating nature of microstrip patch antennas and reduces the design optimization time. In this paper, the resonant behavior of different ground plane sizes are analyzed using this...
A novel design of a broadband mm-wave patch antenna for mobile devices is introduced. The proposed antenna element operates around 40 GHz. Through utilizing a multiple resonances patch structure, 9% bandwidth has been obtained. The substrate consists of low cost material and the antenna with its microstrip feed can easily be integrated with frontend circuits. Two parasitic patches are implemented...
A new antenna design that uses two orthogonal feeds to excite circular polarization in a meshed patch antenna is presented. The antenna is designed on a transparent borosilicate glass substrate to be suitable for integration with solar panels on a microsatellite. Simulated performance shows that for a center frequency of 2.4GHz, an impedance bandwidth and axial ratio of of 50MHz and 0.68dB, can be...
This paper emphasizes on improving the efficacy of patch antennas with meta-material lens embedding. Antenna performance is described in terms of various performance metrics viz. efficiency, gain, directivity, main lobe and power radiation level and bandwidth. For enhancing these parameters Metamaterials (MMs) are used as an uniform flat lens along with the antenna. For analysis purpose, a patch antenna...
The following paper presents and compares simulated results of reflection coefficient, axial ratio, and realized gain, which are related to various structures of patch antenna including single element, subarrays of 2×2 and 4×4. The proposed antennas have a capability of circular polarization in millimeter wave applications. In addition, the basic structure of antennas is in the form of aperture coupled...
This paper proposes the use of a modified frequency reconfigurable Reactive Impedance Surface (RIS) for miniaturization of patch antennas. A periodic array of square patches with slot etched within has been used to realize the RIS. The imaginary impedance of the RIS when used as antenna ground plane has been explored to achieve miniaturization. The RIS however uses a thin substrate maintaining low...
The present work investigates the operation performance of a new shape diamond patch microstrip antenna. The proposed diamond antenna covers the bandwidth from 2.3GHz to 18.5GHz that meets the essential requirements of wide band communications applications, and gives gain ranging from −2.6dBi to 5.3dBi. Three slots are of two T-shapes and one S-shape added to diamond patch to improve the gain, therefore...
This paper addresses the numerical simulations of rectangular patch and E shaped patch antennas for improving the performance of 5.75 GHz industrial, scientific and medical (ISM) band applications. The proposed antennas are directly feed by probe coaxial connector and the feed points are effectively controlled for the required operation. Significant performance enhancement can be realized when the...
This paper mainly aims at introducing a novel structure for achieving a broadband and compact bandstop filter (BSF) based on utilizing a combination of double spiral defective microstrip structure (DSDMS) and complementary split ring resonators (CSRRs). A parametric study has been carried out and the overall bandwidth is enhanced by cascading hybrid-bandstop filter(H-BSF) with different parameters...
This paper presents a 60 GHz CPW-fed patch antenna on multilayer LTCC- and LCP-based materials with new and compact AMC. The proposed antenna structure consists of top three layers of antenna and bottom three layers of AMC ground plane. First, a new and compact three- layer AMC is designed on both LTCC- and LCP-based substrates. The designed AMC is more compact and provides 37.5% higher in-phase bandwidth...
This paper discusses the effect of introducing slots of different shapes and dimensions in a rectangular patch antenna to improve the bandwidth. The return loss as well as VSWR characteristics of different patch designs are discussed and compared. The reference design that is E-shaped slot patch antenna has operating frequency of 2.48 GHz. The design implementation aims to achieve optimized results...
This manuscript deals with the design and performance validation of a compact Fabry-Pérot cavity (FPC) antenna for the fifth generation (5G) system applications. The configuration of the proposed design includes a primary coaxial-fed radiator backed with a full ground plane, an air cavity, and a partially reflecting surface (PRS) with a 4×4 array of split-ring resonator (SRR) cells. The antenna is...
The use of smart devices inreases day by day and becomes an integral part of our daily lives. Communications system started by 2G technology has evolved into 3G, 4G, now we use 4,5G in our country and in the near future will be provided by 5G communications technology. Mentioned systems need appropriate antennas which can meet required frequencies. Therefore, microstrip patch antenna has been designed...
A novel flower-type circular polarization patch antenna is analyzed in this paper. The antenna is composed of four orthogonal antenna units. The phase position of these four elementary antenna units is 0, 90, 90, 0 degrees. The whole antenna is placed on a metal base. The flower-type patch antenna as a radiating element is adopted in the unit. The antenna is evolved from the monopole microstrip patch...
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