60-GHz-Band Switched-Beam Eight-Sector Antenna with SP8T Switch for 180.DEG. Azimuth Scan

Miura, Amane; Ohira, Masataka; Kitazawa, Shoichi; Ueba, Masazumi

doi:10.1587/transcom.e93.b.551

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…Thus, the beam width in the H-plane and E-plane can be almost independently controlled by the sectoral horn and dielectric-loaded tapered slots, respectively, according to the demand specification of a sector antenna. We designed an antenna whose realized gain is more than 16 dBi from 57 GHz to 66 GHz; that is about 2 dB higher than the slot-array antenna proposed in [5], which is same in that it is used for an element antenna for a multi-sector switched-beam antenna. The realized gain of 10 dBi or more can be formed in the 40° angle in the H-plane and 16° in the E-plane in the frequency band.…”

Section: Discussionmentioning

confidence: 99%

“…No solder was used for the connection since there was no film on the boards and they were cut to be small and light. RF feeding power was input by using a coaxial connector [5], with its center pin inserted 10 mm behind the point where the horn began to expand, and the waveguide terminal was made with post-walls 1 mm behind the pin. (The interval between the pin and terminal was set to about a quarter-wavelength so that the wave reflected by the terminal would become in-phase with the wave propagating toward the antenna aperture directly from the pin.)…”

Section: B Numbermentioning

confidence: 99%

“…A multi-sectored switched-beam antenna can be realized by joining a certain quantity of element antennas to the RF switch by cables [5]. However, transducers, which should be used to connect element antennas and cables, have large loss and a narrow frequency band in the millimeter-wave band.…”

Section: Introductionmentioning

confidence: 99%

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Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication

Iigusa

Sato

et al. 2012

IEEE Trans. Antennas Propagat.

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We propose a millimeter-wave antenna to serve as an element antenna for a multi-sector switched-beam antenna, which can be fed by a post-wall waveguide. Several tapered slot antennas are connected to an aperture of an H-plane sectoral post-wall horn antenna whose radiation pattern is narrowed in the H-plane to further narrow the pattern in the E-plane. Moreover, the aperture of each tapered slot antenna is loaded with a dielectric to increase the gain. We designed an antenna whose gain is over 16 dBi in the frequency band of 57-66 GHz. The wideband property is experimentally examined.Index Terms-Millimeter wave, post-wall, horn antenna, tapered slot, wideband

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Section: Discussionmentioning

confidence: 99%

Section: B Numbermentioning

confidence: 99%

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Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication

Iigusa

Sato

et al. 2012

IEEE Trans. Antennas Propagat.

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“…We neglect beam switching time from one sector to another since switching antenna beam from one direction to another takes very little time compared to the time wasted in a collision. [17] reports that an eight sector antenna array takes less than 100 ns to switch from one sector to another sector. Also, [9] suggests an interval of 0.5 µs for beam switching (Beam switching interframe space time) which is much less than the time spend in a collision.…”

Section: A Beamwidth Selection Proceduresmentioning

confidence: 99%

Adaptive beamwidth selection for contention based access periods in millimeter wave WLANs

Chandra

Prasad

Niemegeers

et al. 2014

2014 IEEE 11th Consumer Communications and Networking Conference (CCNC)

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60 GHz wireless local area networks (WLANs) standards (e.g., IEEE 802.11ad and IEEE 802.15.3c) employ hybrid MAC protocols consisting of contention based access using CSMA/CA as well as dedicated service periods using time division multiple access (TDMA). To provide the channel access in the contention part of the protocol, quasi omni (QO) antenna patterns are defined which span over the particular spatial directions and cover a limited area around access points. In this paper, we propose an algorithm to determine the beamwidth of each QO level. The proposed algorithm takes into account the spatial distribution of nodes to allocate the beamwidth of each QO level in an adaptive fashion in order to maximizes the channel utilization and satisfy the required link budget criterion. Since the proposed algorithm minimizes the collisions, it also minimizes the average time required to transmit total packets in a QO level. Proposed algorithm improves the average channel utilization up to 20-30% and reduces the time required to transmit total packets up to 40-50% for the given network parameters.

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Experimental Characterization of Microwave Radio Propagation in ICT Equipment for Wireless Harness Communications

Ohira

Umaba

Kitazawa³

et al. 2011

IEEE Trans. Antennas Propagat.

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In order to obtain near-metal-insensitive antenna for closed-space wireless communications, the impedance characteristics of U-shaped folded monopole antenna is investigated in detail. In this Letter, the near-metal-insensitive means antenna VSWRs are hardly influenced by the near object, especially metal. The simulated and measured results show that the proposed higher impedance model has stronger near-metal-insensitiveness than the conventional middle impedance model. The simulated and measured results show that the antenna gains of higher impedance models are 3 dB greater at maximum than those of middle impedance models, when metal plane approaches. References [1] T. Kobayashi, "Measurements and characterization of ultra wideband propagation channels in a passenger-car compartment," IEICE Trans. "Comparisons of simulated and measured electric field distributions in a cabin of simplified scale car model," IEICE Trans.

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60-GHz-Band Switched-Beam Eight-Sector Antenna with SP8T Switch for 180.DEG. Azimuth Scan

Cited by 3 publications

References 6 publications

Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication

Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication

Adaptive beamwidth selection for contention based access periods in millimeter wave WLANs

Experimental Characterization of Microwave Radio Propagation in ICT Equipment for Wireless Harness Communications

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