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In this paper, the design and particle simulation of a Ka-band stagger tuned gyro-twystron amplifier is presented. The concept of stagger tuning in gyro-twystron improves the bandwidth along with high RF output power which is suitable for radar application. The complete amplifier structure is modelled in “CST particle studio” for studying the beam wave interaction behaviour. The PIC simulation predicted...
This paper compares sequential subarrays of dielectric resonator and patch antennas in terms of circular polarization and impedance bandwidths, and realized gain using hybrid ring feeding networks. Aperture coupled antenna is used as the basic structure.
The need to deliver efficient wireless services has spurred many network providers to access higher frequency bands on the millimetre-wave (mm-wave) platform which caters for larger system bandwidth and throughputs. This option offers networks the benefits of increased carrier flexibility and robust channel capacity, for many user applications, which are currently in high demand. The 60 GHz band is...
This paper presents the effect of dimensions, spacing, periodicity and shapes of Reactive Impedance Surface (RIS) elements on resonating frequency of a suspended 2 × 2 MSA antenna array designed on a RIS loaded FR4 substrate. RIS consists of 13 × 13 square patch array with each patch of side 4mm and 1mm inter-element spacing. Elements of MSA array are fed through a feed line network which is fed by...
In this manuscript, a novel design of millimeter-wave (mm-Wave) dipole phased array antenna for the fifth generation (5G) handset applications is proposed. The proposed antenna is designed to cover some of the candidate bands for 5G communications from 24 to 50 GHz, and has dimension of 8×5.5mm2. The antenna exhibits small and wide bandwidth. The beam steering characteristics in the operation band...
Advanced wireless communication applications demands antennas with enhanced radiation properties over a wide bandwidth. Log Periodic Dipole Antenna array (LPDA) is a new class of antennas that provide constant radiation properties over a wide bandwidth. In this paper, modified planar log periodic antennas are proposed which assure an enhanced gain of 15 dBi at 2.45 GHz. Two designs of LPDA are analysed...
In this paper, a novel X-band broadband single-layer unit cell with attached phase-delay lines for reflectarray antennas is proposed to surmount the limitation of the reflectarray bandwidth. The unit cell is composed of three circular rings, each with a pair of gaps which are mutually placed orthogonally, and two identical circular phase-delay lines are attached to the outer ring to provide the required...
A broadband center-fed reflectarray antenna is presented in this paper. Patch with slot ring on ground plane elements are used for bandwidth improvement. It is shown that quasi-linear phase responses with broad frequency band can be achieved by such a phasing element. An 11×11 elements reflectarray is designed and simulated. The results show that the simulated gain is 23.92 dB at the center frequency...
In this paper, sierpinski-shaped dipoles are introduced in a printed log-periodic dipole antenna design. A Log Periodic Sierpinski Antenna (LPSA) is developed and the characteristics studied. Antenna size is considerably reduced, still maintaining the overall performance characteristics. The results are compared with that of a standard printed LPDA. A set of shapes of LPSA are studied and the observations...
In this paper, a V-band low sidelobe and wideband series fed linear dielectric resonator antenna (DRA) array is proposed. Among many kinds of DRAs, the perforated rectangular dielectric resonator antenna (RDRA) is chosen as the antenna element in our design, which can enhance the impedance bandwidth by lowering down the quality factor. By optimizing the size of the slots and distance between adjacent...
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