Results 251 to 260 of about 333,895 (294)

A Holographic Surface Measurement of the Texas 4.9-m Antenna at 86 GHz

IEEE Transactions on Instrumentation and Measurement, 1983
An instrument has been built which allows the electromagnetic measurement of the surface accuracy of a large millimeter-wavelength antenna. The University of Texas 4.9-m radio telescope has been measured with this technique at 86.1 GHz to an accuracy of 4 ?m at the surface.
Charles E. Mayer, John H. Davis, William L. Peters, Wolfhard J. Vogel   +3 more
openaire   +1 more source

Hexa-Band Branch Line Coupler and Wilkinson Power Divider for LTE 0.7 GHz, LTE 1.7 GHz, LTE 2.6 GHz, 3.9 GHz, Public Safety Band 4.9 GHz, and WLAN 5.8 GHz Frequencies

IEEE Transactions on Circuits and Systems II: Express Briefs, 2020
A hexa-band branch line coupler (BLC) and Wilkinson power divider (WPD) for long term evolution (LTE) 0.7 GHz, LTE 1.7 GHz, LTE 2.6 GHz, 3.9 GHz, public safety band (PSB) 4.9 GHz, and wireless local area network (WLAN) 5.8 GHz frequencies have been proposed, designed, implemented, and analyzed in this brief.
Aijaz M. Zaidi, Mirza Tariq Beg, Binod Kumar Kanaujia, Karumudi Rambabu   +3 more
openaire   +1 more source

High speed wireless access system using 4.9 GHz band

Proceedings IEEE 56th Vehicular Technology Conference, 2003
At present, wireless access systems in the 5 GHz band, specified by the MMAC-PC (Multimedia Mobile Access Communication systems Promotion Council), are allocated frequencies from 5.15 to 5.25 GHz, and only for indoor use in Japan. Outdoor wireless access systems in the 5 GHz band are currently under consideration.
null Yoshio Kunisawa, null Takeo Ohseki, null Hiroyasu Ishikawa, null Hideyuki Shinonaga   +3 more
openaire   +1 more source

A low-cost-packaged 4.9-6 GHz LNA for WLAN applications

IEEE MTT-S International Microwave Symposium Digest, 2003, 2003
A two stage fully integrated low-noise amplifier has been developed for 4.9-6 GHz WLAN applications. This circuit was realized in a 0.35 /spl mu/m SiGe BiCMOS process and packaged in a low cost plastic VFQFPN package. The circuit operates over a wide band (4.9-6 GHz) and draws 13.2 mA from 2.0 V supply.
E. Imbs, I. Telliez, S. Detout, Y. Imbs
openaire   +1 more source

Path loss models for urban macro cell scenario at 3.35, 4.9 and 5.4 GHz

2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015
In this paper, the channel measurements for 5th generation mobile networks (5G) potential spectrum at 3.35 GHz, 4.9 GHz and 5.4 GHz have been performed in the urban macro cell scenarios in China. The measured cases include line-of-sight (LOS) and non-line-of-sight (NLOS) propagation.
Hang Zheng, Wei Li, Lei Tian 0004, Chongpeng Xu, Fusheng Huang, Jianhua Zhang 0001   +5 more
openaire   +2 more sources

IEEE 802.11j operation in Japan at 4.9 GHz and 5 GHz

2011
This chapter contains sections titled: Expanded Country information element Mandatory and optional modes of operation PLCP header, Signal field, and Rate subfield Extended frequency bands and transmit RF power levels Transmit mask and adjacent channel interference Spurious emissions Regulatory domain references
openaire   +1 more source

A direct-conversion CMOS transceiver for 4.9-5.95 GHz multi-standard WLANs

2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519), 2004
A 0.18 /spl mu/m CMOS direct-conversion transceiver consumes only 60 mA in RX mode and 74 mA in TX. System NF is 4.4 dB, and IIP3 is -2 dBm. The transceiver supports world-wide multi-standard WLAN systems with a frequency range of 4.9-5.95 GHz and channel bandwidth of 520 MHz.
T. Maeda, H. Yano, T. Yamase, N. Yoshida, N. Matsuno, S. Hori, K. Numata, R. Walkington, T. Tokairin, Y. Takahashi, M. Fujii, H. Hida   +11 more
openaire   +1 more source

Vertical and Horizontal Building Entry Loss Measurement in 4.9 GHz Band by Unmanned Aerial Vehicle

IEEE Wireless Communications Letters, 2019
User traffic of mobile wireless communication is rapidly increasing in urban areas. Thus, service cell planning becomes an important issue for efficient radio resource usage. Since users are also inside high buildings in those areas, it is important to know the building entry loss (BEL) characteristics from the outside base stations of various ...
Kentaro Saito, Qiwei Fan, Nopphon Keerativoranan, Jun-ichi Takada   +3 more
openaire   +2 more sources

4.9 GHz Band Outdoor-to-Indoor Radio Propagation Measurement by an Unmanned Aerial Vehicle

2018 IEEE International Workshop on Electromagnetics:Applications and Student Innovation Competition (iWEM), 2018
This paper presents the propagation loss measurement system by an unmanned aerial vehicle (UAV) and the outdoor-to-indoor loss characteristics in the high building environment.
Kentaro Saito, Qiwei Fan, Nopphon Keerativoranan, Jun-Ichi Takada   +3 more
openaire   +1 more source

4.5-/4.9-GHz-band tunable high-efficiency GaN HEMT power amplifier

2017 47th European Microwave Conference (EuMC), 2017
A 4.5–4.9-GHz-band tuneable high-efficiency GaN HEMT power amplifier has been developed to meet the demand for high-speed data-rate wireless communication systems. By applying one-eighth-wavelength, closely spaced, parallel, open-ended stubs to set a short condition at a mid second-order harmonic frequency, and by switching its condition between ...
Kazuki Mashimo, Ryo Ishikawa, Kazuhiko Honjo   +2 more
openaire   +1 more source