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33rd European Microwave Conference, 2003, 2003
A cavity-backed slot antenna is proposed. The antenna is theoretically and experimentally studied. The antenna consists of a slot cut in a ground plane and backed by shorting strips, forming a backing cavity. Experimental studies of the antenna show a 2:1 VSWR input impedance bandwidth of more than 20%.
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A cavity-backed slot antenna is proposed. The antenna is theoretically and experimentally studied. The antenna consists of a slot cut in a ground plane and backed by shorting strips, forming a backing cavity. Experimental studies of the antenna show a 2:1 VSWR input impedance bandwidth of more than 20%.
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2010 IEEE Antennas and Propagation Society International Symposium, 2010
The impedance of an open slot antenna at its second resonance has a wider bandwidth than at the ubiquitous first resonance (half wavelength) configurations [1]-[4]. When the supporting groundplane size is small (less than a square wavelength), the wideband nature can be retained [4], but the pattern changes owing to the diffractions from the edges of ...
J X Yun, R G Vaughan
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The impedance of an open slot antenna at its second resonance has a wider bandwidth than at the ubiquitous first resonance (half wavelength) configurations [1]-[4]. When the supporting groundplane size is small (less than a square wavelength), the wideband nature can be retained [4], but the pattern changes owing to the diffractions from the edges of ...
J X Yun, R G Vaughan
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Employing the dumbbell-shaped longitudinal slot antennas in the planar slotted antenna arrays
International Journal of Microwave and Wireless Technologies, 2021AbstractThe dumbbell-shaped longitudinal slot antennas are employed as a replacement for the round-ended longitudinal slot antennas. Each dumbbell-shaped slot is excited by an iris and a septum that have offsets from the waveguide centerlines. All the slots are also cut along the waveguide centerlines. It is demonstrated that the resonant length of the
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Suppression of slot mode in slotted waveguide antennas
IEEE Transactions on Antennas and Propagation, 1975It has been found experimentally that the efficiency of radiation of the slot mode in slotted waveguide antennas increases with the slot width. The excitation of the slot mode can be prevented by covering the slot with a thin film of metal. Alternatively, the slot may be covered with a sheet of dielectric to suppress the slot mode.
R. Garg, K. Gupta
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IRE Transactions on Antennas and Propagation, 1955
The conditions for endfire radiation from a traveling-wave slot are discussed. These are that the phase velocity of the traveling wave be equal to or less than the velocity of light in free space and that the aperture be excited with a strong longitudinal component of electric field.
B. Stephenson, C. Walter
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The conditions for endfire radiation from a traveling-wave slot are discussed. These are that the phase velocity of the traveling wave be equal to or less than the velocity of light in free space and that the aperture be excited with a strong longitudinal component of electric field.
B. Stephenson, C. Walter
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Dualband DRA-slot hybrid slot antenna
2007 IEEE Antennas and Propagation Society International Symposium, 2007A dielectric resonator antenna (DRA) is placed on top of a slotted cavity to form a hybrid antenna. An L-probe is placed inside the cavity to feed the zonal slot, cut onto the cavity, and the DRA simultaneously. Ansoft HFSS was used to analyze the proposed hybrid antenna, which provides a dual-band operation.
Y. Ding, K. W. Leung, Y.C. Or
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Investigation of SRR slot on monopole antenna
2014 IEEE International Conference on Control System, Computing and Engineering (ICCSCE 2014), 2014The antenna performance in achieving better return loss, gain, and efficiency can be potentially worked out by adding Split Ring Resonator (SRR) slot to the antenna structure. Thus, this paper investigates the effect of SRR slot on a monopole antenna at wideband frequency ranged from 2.9GHz to 6.6GHz.
T. K. Ong +5 more
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Capacitively loaded compact slot antenna
2012 IEEE 17th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), 2012In this paper, a compact tuneable F-slot monopole antenna for mobile handset applications, covering the DCS, PCS, and UMTS frequency bands, is presented and studied. An F-shaped slot is embedded in a rectangular monopole patch to accommodate the varactor.
Issa T. E. Elfergani +3 more
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Journal of Applied Physics, 1953
Approximate formulas for the complex propagation constant and characteristic field configuration for dielectric-filled traveling wave slot antennas are obtained by a variational procedure. To set up the variational method, the generalized reciprocity theorem for traveling wave line sources is deduced; it differs considerably from the reciprocity ...
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Approximate formulas for the complex propagation constant and characteristic field configuration for dielectric-filled traveling wave slot antennas are obtained by a variational procedure. To set up the variational method, the generalized reciprocity theorem for traveling wave line sources is deduced; it differs considerably from the reciprocity ...
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Radio Science, 1979
The concept of a natural slot antenna for very low frequency is discussed. It is suggested that a viable system needs to have an insulated cavity backing the slot aperture.
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The concept of a natural slot antenna for very low frequency is discussed. It is suggested that a viable system needs to have an insulated cavity backing the slot aperture.
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