US4547779A - Annular slot antenna - Google Patents A microstrip annular antenna structure is formed by four quarter-wavelength microstrip radiator patches arranged in a quadrant formation and having outwardly directed adjacent radiating apertures which together provide a composite annular radiating slot extending about 360° of azimuth. All such radiators are fed in-phase by a single centrally located feedpoint and equal length microstrip US Patent for Cavity slot antenna Patent (Patent In one embodiment, the present invention provides an antenna array for transmitting one or more beams in a communication system. The antenna includes a cavity slot antenna array that is adapted to be operatively connected to a beam forming module (e.g., via a plurality of signal feed lines that are connected to radiating signal probes). The antenna array has one or more cavity slot columns
US Patent for Dual slot microstrip antenna device Patent ...
Index Terms— Double-layer structure, cavity-backed slot antenna, waveguide slot-array, corporate feed network. I. INTRODUCTION Waveguide slot array antennas are expected to provide high aperture efficiency and also high gain at mm-wave frequencies due to the lower losses in the distribution networks [1-2]. A COMPACT DUAL-CIRCULARLY POLARIZED CAVITY-BACKED RING- SLOT ... on top of the center conductor of a ring-slot antenna. Two cavity-backed ring-slot antennas are presented with unidirectional radiation properties. The first is a linearly polarized CPW-fed ring-slot antenna. A T-shaped CPW feed was used to capacitively excite the ring-slot structure. The bottom of the cavity is formed by an AMC Design Of A Wideband Dual-polarized Cavity Backed Slot Antenna
International Journal of Antennas and Propagation - Hindawi
Compact integrated slot array antennas for the 79 GHz ... The RX antenna consists of an array of 8 × 8 single slot antenna elements according to Fig. 10 below. Figure 11 shows the complete manufactured TX and RX antenna with a metal frame foot print for the metal back cavity assembly. The metal frame is grounded using microvias to the ground plane. V. CAVITY-BACKED ANTENNA Slot Antenna Slot antennas are used typically at frequencies between 300 MHz and 24 GHz. The slot antenna is popular because they can be cut out of whatever surface they are to be mounted on, and have radiation patterns that are roughly omnidirectional (similar to a linear wire antenna, as we'll see). Design of Wide-Band, High Gain Microstrip Antenna Using ...
3 ASK-2163A/AA Series Cavity Backed Spiral Antenna. 4 Cobham ... Single element notch and horn antennas have been used .... receive signals, a tripod assembly for mounting ... 39 ARAAM Proximity Fuse-Printed Slot Array Antenna. 39. 36.
on top of the center conductor of a ring-slot antenna. Two cavity-backed ring-slot antennas are presented with unidirectional radiation properties. The first is a linearly polarized CPW-fed ring-slot antenna. A T-shaped CPW feed was used to capacitively excite the ring-slot structure. The bottom of the cavity is formed by an AMC Single-Layer Cavity-Backed Slot Array Fed by Groove Gap Dec 22, 2015 · A $4 \times 4$ slot array has been designed using this concept. The goal of this letter is to demonstrate the viability of groove gap waveguides and coaxial cavities for the design and fabrication of high-frequency single-layer slot-array antennas. Simulation results as well as …
Slot Antenna. Slot radiators or slot antennas are antennas that are used in the frequency range from about 300 MHz to 25 GHz. They are often used in navigation radar usually as an array fed by a waveguide.
US5581266A - Printed-circuit crossed-slot antenna - Google… An improved printed-circuit cross-slotted antenna for satellite communication. The antenna comprises a dielectric substrate covered with conductive material on a first ground plane side and on a second radiating side. US5714961A - Planar antenna directional in azimuth and/or… H01Q13/18 — Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas US4218685A - Coaxial phased array antenna - Google Patents 2. An antenna assembly as defined in claim 1 wherein three of said monopole radiation means are structured such that their balun means balanced segments are within said first antenna cavity means, and the other said monopole radiation … US4259670A - Broadband microstrip antenna with automatically…
A Cavity-backed Coplanar Waveguide Slot Antenna Array James McKnight ABSTRACT In this thesis, a cavity-backed slot antenna array is designed for relatively wide instantaneous bandwidth, high gain and low sidelobes. The array consists of four, rectangular, slot elements, arranged side-by-side in a linear array and developed around 5GHz. WIDE BEAM TAPERED SLOT ANTENNA FOR WIDE ANGLE SCANNING PHASED ... WIDE BEAM TAPERED SLOT ANTENNA FOR WIDE ANGLE SCANNING PHASED ARRAY ANTENNA A. Kedar and K. S. Beenamole Electronics & Radar Development Establishment (LRDE) C V Raman Nagar, Bangalore 560093, India Abstract|Design and development of a low proflle, compact, wide beam and wide band printed double layered exponentially tapered slot