Separate-type slot antennas for millimeter wave radiation

Receiving properties of folded-slot array antennas for 94-GHz millimeter wave radiation

“…(7) which give the effect on the antenna patterns D n T E and D m T H in Eq. (8), and to calculate the power gain of the two-dimensional folded-slot array antenna. Therefore, in the first half of the next section, we derive G and a using a monolithic-type folded-slot array antenna from the experiments in the microwave region, and obtain the basic properties of the antenna by putting the values of G and a in Eqs.…”

“…Therefore, in the first half of the next section, we derive G and a using a monolithic-type folded-slot array antenna from the experiments in the microwave region, and obtain the basic properties of the antenna by putting the values of G and a in Eqs. (1) and (8). In the second half, we expand the theory obtained from the experiments in the microwave region to the millimeter wave region, and discuss the receiving properties of the separate-type foldedslot array antenna experimentally.…”

“…The thickness t of the polyimide layer was 1.6 Pm and is equivalent to 5 u 10 4 O 0 (free space wavelength O 0 of 94 GHz). This indicates that the existence of the polyimide does not affect the receiving properties of the antenna [8]. Separate-type folded-slot antennas and a CPW were fabricated on a fused quartz substrate (H r 3.8).…”

“…The thickness of the substrate was 3.68 mm which is equivalent to 2.25 O d (which is an odd multiple of O d / 4) [11]. The Bi bolometer and the output leads were fabricated on a thin fused quartz substrate whose thickness was only 0.1 mm so as not to affect the resonant frequency of the antenna [8]. The antenna and CPW were fabricated using photolithography and wet etching [13].…”

“…2, February 1999, pp. 268275 monolithic-type slot antenna [8]. However, a problem occurred in wiring the output lead when we tried to fabricate a separate-type slot array antenna.…”