US6646618B2 - Low-profile slot antenna for vehicular… A crossed slot antenna, a method of fabricating same and a method of designing same. The antenna includes a cavity structure having conductive material on opposed surfaces thereof; and two slots in said conductive material, the slots … US8941541B2 - Multilevel antennae - Google Patents An apparatus includes an antenna concealed within a portable communication device and configured to operate in non-overlapping frequency bands. The antenna includes an antenna element with a multilevel structure of geometric elements … US3902177A - Antenna for direction finders - Google Patents This invention relates to an antenna for direction finders presenting a high sensitivity in a narrow band by making a loop antenna and a shielding tube resonate at any two desired frequencies.
A BROADBAND VHF-L BAND CAVITY-BACKED SLOT SPIRAL ANTENNA
Microwave Engineering Corporation | Omni-Directional Antennas L-BAND ANNULAR SLOT ANTENNAS. M.E.C.’s c390-152 L-band annular slot, flush-mount antennas feature an omni-directional azimuth pattern and high peak power handling capability. Its radiation pattern and gain are similar to a matched quarterwave monopole. This antenna meets MIL-A-25707 and is designed to IFF and/or TACAN applications. Compact UWB-MIMO antenna with metamaterial FSS decoupling In this paper, an UWB-MIMO antenna with frequency selective surface (FSS) decoupling structure is proposed. To realize antenna system miniaturization and integration, silicon material is applied as substrate. The proposed antenna becomes a very compact construction with dimension of 38.2 × 26.6 × 0.4 mm. The proposed broadband FSS unit consists of four split rectangles and one I-shaped strip. Draft Version A Reconfigurable Radiation Pattern Annular radiation pattern of the antenna. II. ANTENNA DESIGN AND OPERATION A. Annular slot antenna in DC operating mode Monopole antenna has been the subject of many classic studies for diversity in radiation pattern of an antenna. A monopole antenna has an omnidirectional radiation pattern which is essential for wide range of technologies. The
Planar monopole antennas with multiple feed points are proposed to improve pattern and impedance bandwidth. A square planar monopole antenna including two feed points and a bevelled variant are designed.A Broadband Pattern Diversity Annular Slot Antenna.
Standard DF antenna models are typically broadband antennas covering frequencies across the communications bands from HF through UHF or approximately 2.0 MHz to 2700 MHz. The most common design is a cavity-backed annular slot that incorporates ferrite elements for the lower HF frequency range. Manufacturer of radio directional finding (RDF ... DUAL-BAND BEAM SCANNING REFLECTARRAYS AND NOVEL … Dual-band Beam Scanning Reflectarrays and Novel Wideband and Polarization Diversified Planar Antennas. (August 2008) Shih-Hsun Hsu, B.S., National Cheng Kung University; M.S., University of Wisconsin-Madison Chair of Advisory Committee: Dr. Kai Chang The reflectarray antenna has been considered as a suitable candidate to replace the Microwave Engineering Corporation | Omni-Directional Antennas
Broadband annular slot antenna with polarization diversity ...
In this paper, an UWB-MIMO antenna with frequency selective surface (FSS) decoupling structure is proposed. To realize antenna system miniaturization and integration, silicon material is applied as substrate. The proposed antenna becomes a very compact construction with dimension of 38.2 × 26.6 × 0.4 mm. The proposed broadband FSS unit consists of four split rectangles and one I-shaped strip.
Harris’ Q134 Antenna offers the latest in fully conformal, low RCS antenna. The Q134 antenna capitalizes on Harris’ proven annular-slot technology providing a 3.7:1 operating bandwidth, which exceeds the useful bandwidth of most blades and other exposed apertures. In addition to the broad operating bandwidth, the Q134 also
Volume-7 Issue-2 | International Journal of Engineering and… International Journal of Engineering and Advanced Technology (Ijeat) covers topics in the field of Computer Science & Engineering, Information Technology, Electronics & Communication, Electrical and Electronics, Electronics and … Biology, Geography & Health Research: Chapter 64158
loop antenna over an annular slot loaded ground plane are shown in Section III. Section IV presents a parametric analysis of the ground plane’s effect using a numerically simulated broadband spiral antenna, including parametric analysis of the slot ring radius, slot width, substrate height, and substrate material. PIER C Online - Compact Ultrawideband MIMO Antenna with ... PIER C : Progress In Electromagnetics Research C ... He, "Closely-packed UWB MIMO/diversity antenna with diggerent patterns and polarizations for USB dongle applications," IEEE Transactions on ... M. Bozzetti, J. M. Molina-Garcia-Pardo, and L. Juan-Llacer, "A broadband pattern diversity annular slot antenna," IEEE Transactions on Antennas and ... Dual-Band Microstrip Patch Antenna for Wireless Applications Keywords: Microstrip, dual-band, wireless, wide-band, slot-loaded Abstract A small wideband microstrip patch antenna is introduced. The antenna is designed to function in the 5-6 GHz wireless LAN bands. It achieves multi-band functionality through the addition of a slot to a square patch (21 mm by 21 mm by 2.6 mm). Dual-polarization and dual-pattern planar antenna for ... The annular ring slot antenna can be useful for the implementation of a pattern/polarization receiving diversity scheme in on-body and off-body communication systems. Diversity gain measurements in both an anechoic chamber and an actual indoor environment are being performed, for different body positions and typical body movements, as already ...