Browsing by Author "Chen, I-Yu"

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An novel l-shape active leaky-wave antenna with power combining and scanning capability
(2005)
Chen, I-Yu
;
Wang, Chien-Jen
;
Jou, Christina F.
;
電信工程研究所
;
Institute of Communications Engineering
In this paper, an active-integrated leaky-wave antenna with power combining scanning capability is presented. This leaky-wave antenna with the novel perpendicular L-shape topology is integrated with a varactor-tuned high-electron mobility transistor (HEMT) voltage controlled oscillator (VCO) on the same plane. Changing the VCO frequency, we can control not only the dual-beam scanning angle but also derive the power combining effect with the sum (Sigma) or difference (Delta) radiation patterns. The power combing effect of difference mode, which is the dual-beam pattern and the sum mode pattern, which is a 3-beam pattern, with, the 3rd beam located along the middle direction (45 degrees, 135 degrees) of the X and Y axes. The measured scanning angle is steered over a range of 24-46 degrees for the right beam and 127-148 degrees for the left beam. Compared with single microstrip leaky-wave antenna, the L-shape LWAs configuration has the advantages of switchable radiation patterns as the VCO varied from 10 GHz to 10.6 GHz.
Folded dual-band (2.4/5.2GHz) antenna fabricated on silicon suspended parylene membrane
(2005)
Chen, I-Yu
;
Huang, Chuen-Uan
;
Chen, Henry J. H.
;
Jou, Christina F.
;
Huang, Star Ruey-Shing
A novel and simple kind of dual-band monopole MEMS membrane antenna fabricated on silicon suspended parylene membrane is presented. This parylene membrane is a flexible polymer film and it can be coated on various shapes and surfaces of materials or even peeled off from materials as thin flexible substrate. Because of its low deposition processing temperature, it is possible to be fabricated on CMOS circuits post process with MEMS technology. This folded monopole parylene membrane antenna provides two resonant paths of different lengths to achieve the desired dual-band (2.4/5.2GHz) operation for Bluetooth and WLAN application. The low cost, easy fabrication, easily stickable and peel-off flexible properties of this parylene membrane makes it very attractive and convenient in any wireless portable devices such as mobile phone, RFID tag, Bluetooth and WLAN devices, even any wearable clothes... etc.