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In this paper we propose a new geometry to generate an isotropic radiation pattern. Derivate from the classical half-wave dipole, the radiation pattern in the three dimension plane (xy, yz and xz) has a very closed uniform distribution. The axial ratio in each one of the three planes is near to one for the proposal dipole shape. The new geometry allows the development of compact measurement systems...
This paper presents a tri-band dual-polarized cylindrical dielectric resonator antenna (DRA). To obtain dual linear polarization, the probe- and slot-fed excitation methods are used for Ports 1 and 2 of the antenna, respectively. The antenna makes use of two fundamental modes and three higher-order modes of cylindrical dielectric resonator to achieve tri-band. Also, the antenna has high input isolation...
By taking advantage of the unique and unusual properties of the recent composite right-/left-handed metamaterial transmission line, we have designed a small-sized resonant antenna that can operate in three different frequency bands. The antenna is well matched to the outer network by the use of a compact matching circuit and the resulting radiation characteristics make it suitable for short-range...
A photonic-assisted reactive near-field scanner for planar antennas is presented. We, KRISS (Korea Research Institute of Standards and Science), have recently developed electro-optic sensors as all-dielectric electric field probes and utilized them for field imaging of antenna patterns. The performance of our system, as well as calibration of the system drift, are introduced by exploring 4 × 4 patch...
High power microwave radiation in the S-band is being studied in small body waveguides. Waveguide structures are being developed that transmit high power microwaves in the S band from the TE11 mode into high gain, highly directive radiation patterns. Using advanced modeling techniques, the behavior of these high power electromagnetic waves can be accurately described inside the waveguide as well as...
This paper presents a star shaped reconfigurable microstrip antenna which exhibits frequency tuning and radiation pattern alteration for different configurations. Switches are suggested to reconfigure the antenna. The antenna is fabricated and measured and simulated results are compared. This antenna can be used in several practical applications according to each configuration. The antenna is then...
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