Design of A-shaped coaxial fed compact broadband antenna for WLAN/WiMAX/UWB lower-band applications

2017 ◽  
Vol 59 (4) ◽  
pp. 848-853 ◽  
Author(s):  
Aritra Bhowmik ◽  
Anup Kr. Bhattacharjee
Keyword(s):  
Broadband Antenna ◽  
Lower Band

scholarly journals Titanium-Based Microbolometers: Control of Spatial Profile of Terahertz Emission in Weak Power Sources

2020 ◽  
Vol 10 (10) ◽  
pp. 3400
Author(s):  
Linas Minkevičius ◽  
Liang Qi ◽  
Agnieszka Siemion ◽  
Domas Jokubauskis ◽  
Aleksander Sešek ◽  
...  
Keyword(s):  
Imaging Techniques ◽  
Dark Field ◽  
Spatial Mode ◽  
Contrast Imaging ◽  
Optical Components ◽  
Broadband Antenna ◽  
Power Sources ◽  
Precise Control ◽  
Imaging And Spectroscopy ◽  
And Control

Terahertz (THz) imaging and spectroscopy set-ups require fine optical alignment or precise control of spatial mode profile. We demonstrate universal, convenient and easy-to-use imaging—resonant and broadband antenna coupled ultrasensitive titanium-based—dedicated to accurately adjust and control spatial mode profiles without additional focusing optical components of weak power THz sources. Versatile operation of the devices is shown using different kinds of THz—electronic multiplier sources, optical THz mixer-based frequency domain and femtosecond optoelectronic THz time-domain spectrometers as well as optically pumped molecular THz laser. Features of the microbolometers within 0.15–0.6 THz range are exposed and discussed, their ability to detect spatial mode profiles beyond the antennas resonances, up to 2.52 THz, are explored. Polarization-sensitive mode control possibilities are examined in details. The suitability of the resonant antenna-coupled microbolometers to resolve low-absorbing objects at 0.3 THz is revealed via direct, dark field and phase contrast imaging techniques as well.

Efficient Robust Broadband Antenna Array Processor in the Presence of Look Direction Errors

2013 ◽  
Vol 61 (2) ◽  
pp. 718-727 ◽  
Author(s):  
M. S. Hossain ◽  
G. N. Milford ◽  
M. C. Reed ◽  
L. C. Godara
Keyword(s):  
Antenna Array ◽  
Array Processor ◽  
Broadband Antenna
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