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In this paper, a slotted rook shaped novel wide band microstrip patch antenna suitable to be employed for C-Band satellite downlink, Radio Altimeter, IMT, WiMAX applications has been proposed. The proposed antenna is resonant at 4.3 GHz with an impedance bandwidth of 1.419 GHz (3.181 GHz to 4.6 GHz) and a return loss of −53.94dB. The Teflon is used as substrate for designing the proposed antenna having...
Microstrip antennas are one of the most widely studied antenna structures, perhaps due to their inherent properties like compact size, light weight and their capability to get integrated with other circuit components. A three dimensional rectangular slot loaded dielectric (Alteration of Dielectric Substrate) of the antenna for dual-band (S & C) operation has been proposed for remote sensing applications...
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 coplanar waveguide (CPW) fed circularly polarized monopole antenna is presented. The monopole antenna is placed inside a hexagonal shaped slot which is acting as a ground plane. A pair of L-shaped stubs are placed diagonally inside the slot. In order to enhance the impedance bandwidth a spiral discontinuity is created in the grounded ring, near to the edge of the L-stub. The measured result shows...
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...
Design of non-Foster matching networks for monopole and loop printed antennas operating much lower their resonance frequencies are presented. Both matching networks consist of a non-Foster element (negative capacitance or negative inductance) to compensate partly the antenna reactance and a lumped-element transformer to convert the real part of the antenna impedance to 50 Ohm. The non-Foster elements...
A Compact Wideband Monopole Antenna, designed for wireless applications has been investigated in this paper. The antenna consists of a Radiating Patch along with a Defected Ground Plane. The proposed antenna has been compared with a similar Radiating Patch without any Defected Ground Structure (DGS) and the results have been discussed with comparison plots. The proposed antenna covers a frequency...
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...
The resonance characteristics of cross-dipole planar antennas are analyzed by using Theory of Characteristic Modes (TCM) in this paper. The resonant frequency, bandwidth, current distribution and other characteristics of the antenna are compared here. Unlike the traditional analysis methods, the mode decomposition is proposed here. It considering the radiating structure as a whole, seek the support...
In Simultaneous Transmit and Receive (STAR) systems, antenna port isolation is important as it reduces coupling between transmit and receive chains. If the coupling is too high, the transmit signal can leak into the receive path and saturate the receiver. In this paper, we present a dual-polarized four-arm spiral array operating from 3 to 5 GHz for concurrent right hand and left hand circular polarizations...
This paper presents the latest progress in demonstrating and characterizing the Traveling-Wave Antenna Array (TWAA) as a Multioctave Planar Phased Arrays (MPPA) capable of efficient wide-angle scan over multioctave bandwidth. (Beam Steering Network (BSN) and T/R module are not included here.) Four brass board TWAA panels having 16∗16 array elements were fabricated and tested for wide-angle scan up...
A Planar Ultra-Wideband Modular Antenna (PUMA) array with 7mm element spacing is presented that operates over roughly 3.5GHz to 21GHz, validating the first PUMA with a 6:1 operational bandwidth. The design consists mainly of plated through vias on Rogers 5880LZ substrate with Rogers 3000-class materials integrated as a radome superstrate. The aperture is less than 0.5 wavelengths thick at the highest...
This paper describes the use of stereolithography (SLA) and other additive manufacturing (AM) techniques to realize novel broadband (>3:1 bandwidth), dual-polarized, wide-scan, phased array radiators on λ/2-grid at S-, X-, Ku- and W-Band. Three new radiator designs are described, which are variants of the widely used notch antenna (also known as the tapered slot antenna (TSA) or Vivaldi antenna)...
This paper presents a wideband and high gain circularly polarized ultra-high-frequency (UHF) radio frequency identification (RFID) reader antenna. Such antenna is composed of one main radiation patch and one parasitic radiation patch with air as the dielectric layer. And two feeding lines connect to the main radiation patch with 90 deg phase difference. Numerical optimizations and experimental demonstrations...
In this paper we present 1Gb/s wireless data reception at different sub-THz carrier wave frequencies, using a single quasi-optic Schottky receiver module. The module employs a Log-Spiral broadband antenna patterned on silicon. In this paper we present the performances at carrier wave frequencies ranging from 90 GHz to 330 GHz, demonstrating for the first time the flexibility of the module as versatile...
We report on a monolithic extracting structure for terahertz quantum cascade laser based frequency combs. For a spectral bandwidth of more than 600 GHz at a center frequency of 2.5 THz a frequency comb with well-defined farfield pattern could be achieved. In addition the dynamic range of the frequency comb has been significantly improved.
In this paper, a compact broadband monopole RFID reader antenna with operating frequency of 2.45 GHz is designed for vehicle detection application. This reader antenna is buried in the ground of parking lot along the curb. The antenna comprises a planar loop monopole element which is fed by a microstrip line. The proposed antenna is simulated using HFSS (High Frequency Structure Simulator) as a 3D...
In this contribution, we discuss a possible antenna-based cloak for overcoming the intrinsic narrow frequency and angular bandwidths of conventional metasurface-based cloaks. The idea is to use a fully passive antenna array to mimic the reflection from a ground plane even in presence of an electrically large metallic bump. Here, a triangular bump over a ground plane is cloaked covering both sides...
A compact dual – band antenna for 2.4/5.2/5.8-GHz wireless local area network (WLAN) applications ispresented. The antenna consists of two elements, a C shapedelement and a E shaped element. Both of these elements result inexcitation of two resonant modes for dual – band operation. TheC shaped element is fed directly with coaxial probe. The Eshaped element is coupled with ground plane using a connectingcylindrical...
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