Results 201 to 210 of about 1,302,382 (255)

Saddle antenna radio frequency ion sources.

Review of Scientific Instruments, 2016
V. Dudnikov, R. Johnson, S. Murray, T. Pennisi, M. Santana, C. Piller, M. Stockli, R. Welton, J. Breitschopf, G. Dudnikova   +9 more
semanticscholar   +1 more source

Reconfigurable Antennas for Cognitive Radio

2016
With the development of the cognitive radio, that is a system (transceiver) aware of its own operational capabilities and needs which aims at a more efficient use of radio resources (e.g., more universal solution for the co-existence of multiple radio standards, but also limitation of electromagnetic radiations), the antennas with reconfiguration ...
Trong Duc Nguyen, Yvan Duroc, Tan-Phu Vuong   +2 more
openaire   +1 more source

Packset radio antenna measurements

IRE International Convention Record, 2005
Packset radio antennas in the HF and VHF ranges have traditionally presented severe matching problems due to the dependence of antenna parameters on position, surroundings and operator. The advent of high power (20-40W) packsets tunable over the entire HF and VHF range have made better antenna matching desirable. A novel antenna measurement test set is
openaire   +1 more source

Antenna Combined with Radio Tuner

SAE Technical Paper Series, 1988
<div class="htmlview paragraph">Since the introduction of the car radio, reception quality has been less than perfect. Currently, audio reception is accomplished with a co-axial cable between the antenna and radio tuner. Unfortunately this system looses transmission in various ways.</div> <div class="htmlview paragraph">Today we will ...
openaire   +1 more source

Design and Development of Low Profile MIMO Antenna for 5G New Radio Smartphone Applications

Wireless personal communications, 2019
A. Biswas, V. Gupta
semanticscholar   +1 more source

On Secure Underlay MIMO Cognitive Radio Networks With Energy Harvesting and Transmit Antenna Selection

IEEE Transactions on Green Communications and Networking, 2017
Hongjiang Lei, Ming Xu, I. S. Ansari, Gaofeng Pan, K. Qaraqe, Mohamed-Slim Alouini   +5 more
semanticscholar   +1 more source

Secrecy Outage Performance of Transmit Antenna Selection for MIMO Underlay Cognitive Radio Systems Over Nakagami- $m$ Channels

IEEE Transactions on Vehicular Technology, 2017
Hongjiang Lei, Chao Gao, I. S. Ansari, Yongcai Guo, Yulong Zou, Gaofeng Pan, K. Qaraqe   +6 more
semanticscholar   +1 more source

A Frequency Reconfigurable Folded Antenna for Cognitive Radio Communication

Micromachines, 2023
Ahmed A Ibrahim, Wael A E Ali, Moath Alathbah   +2 more
exaly  

Antennas for Mobile Radio Systems

2004
Transmission and reception of radio waves require antennas. In providing gateways to transmission and reception of radio signals, antennas play important roles both at the base station and mobile terminal. Though, higher transmit power and greater receiver sensitivity can improve radio link quality and reliability, the regulatory authorities place a ...
openaire   +1 more source

Compact Reconfigurable UWB Slot Antenna for Cognitive Radio Applications

IEEE Antennas and Wireless Propagation Letters, 2017
G. Srivastava, A. Mohan, A. Chakrabarty
semanticscholar   +1 more source