Diversity antenna studies at 2.3 GHz for automotive applications, and MEMS-based antenna diversity switching circuit

2003 ◽  
Author(s):  
H.J. Song ◽  
D. Sievenpiper ◽  
H.P. Hsu ◽  
G. Tangonan ◽  
J. Pikulski ◽  
...  
Keyword(s):  
Antenna Diversity ◽  
Automotive Applications ◽  
Switching Circuit ◽  
Diversity Antenna

scholarly journals A compact dual-band dual-port diversity antenna for LTE

2012 ◽  
Vol 1 (1) ◽  
pp. 52
Author(s):  
L. Mouffok ◽  
A. C. Lepage ◽  
J. Sarrazin ◽  
X. Begaud
Keyword(s):  
Antenna System ◽  
Dual Band ◽  
Handheld Devices ◽  
Antenna Diversity ◽  
Mobile Terminals ◽  
Term Evolution ◽  
Diversity Gains ◽  
Diversity Antenna ◽  
Good Agreement

The design of a compact dual-band dual-port antenna system is presented. It operates in two frequency bands, 790-862 MHz and 2500-2690 MHz, thereby making it suitable for Long Term Evolution (LTE) handheld devices. The proposed system is composed of two orthogonal inverted-F antennas (IFA) to perform diversity in mobile terminals. A good agreement is observed between simulated and experimental results. The high antenna diversity capability of the proposed system is highlighted with the calculation of envelope correlation coefficient, mean effective and diversity gains for different environment scenarii.

One-element diversity antenna with reactance-switching circuit for mobile phones

2004 ◽  
Author(s):  
Y. Nishioka ◽  
T. Fukasawa ◽  
M. Ohtsuka ◽  
S. Makino ◽  
Y. Sunahara ◽  
...  
Keyword(s):  
Mobile Phones ◽  
Switching Circuit ◽  
Diversity Antenna

TRANSIENT RESPONSE OF FAST ACTING SOLENOIDS IN AUTOMOTIVE APPLICATIONS

1994 ◽  
Vol 04 (04) ◽  
pp. 415-428 ◽  
Author(s):  
H. HONG ◽  
T. KREPEC ◽  
R.M.H. CHENG
Keyword(s):  
Mathematical Model ◽  
Gas Injection ◽  
Test Results ◽  
Automotive Applications ◽  
Switching Circuit ◽  
Injection Process ◽  
Opening And Closing ◽  
Fast Acting ◽  
Flux Leakage ◽  
Good Agreement

The dynamic response of small solenoid-operated injectors employed for discharging the high-pressure gaseous fuel in diesel engines must be precisely controlled down to a few tenths of a millisecond. This paper shows how a simple but effective switching circuit can control the generation of the solenoid force to meet the stringent timing requirements for the opening and closing of such an injector. A mathematical model of the solenoid was established, to identify the force as a function of current and of the air gap, and for the purpose of simulating the full gas injection process. The model includes effects of eddy current and flux leakage losses in order to account for the hysteresis of the magnetization of the solenoid. Good agreement with the test results has been obtained, allowing the use of the simulation program for further injector optimization.

Study of SiC Device for Pulsed Power Switching Circuit

2019 ◽  
Vol 139 (8) ◽  
pp. 345-350
Author(s):  
Toru Tagawa ◽  
Tomohiko Yamashita ◽  
Takashi Sakugawa ◽  
Sunao Katsuki ◽  
Kenzi Hukuda ◽  
...  
Keyword(s):  
Pulsed Power ◽  
Switching Circuit ◽  
Power Switching
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