Design and fabrication of 94‐ghz slot array antennas

Abstract

A slot array antenna with parasitic slots was fabricated with the goal of increasing the gain of a slot antenna on a thick dielectric substrate operating in both millimeter and submillimeter wave regions. By using the design values obtained by microwave model experiments, a 9 4 4 H z millimeter-wave slot array antenna was fabricated on a f u d quartz substrate and the power gain of this antema was experimentally studied. The fabricated antenna was found to operate as an array antenna at 94 GHz. Its power gain was increased by 5 -6 dB over that of the single-slot antenna. This value agreed well with the 5.5dB gain improvement derived in the microwave model experiments. Hence, it was confined that the parasitic slots effectively contribute to the gain improvement of the antenna.

Receiving properties of slot array antennas with parasitic slots on dielectric substrates

“…It is experimentally confirmed that this spacing is effective for the CPW feed [11]. Hence, the array spacing (d k ) in Fig.…”

Separate-type slot antennas for millimeter wave radiation

“…the antenna was calculated by using the detected voltage and the dc sensitivity of the Bi bolometer [13]. Figure 5 shows the relationship between the receiving power of the slot antenna and the thickness of the isolation layer.…”

“…A gold film with an area of 50 mm u 50 mm was deposited on the S-I, and the slot antenna was fabricated using photolithography and wet etching [13]. The size of the slot antenna used was changed with a change in the frequency of the incident wave tested.…”

“…Since the wavelength in these frequency regions is shorter than that in the microwave region, antennas and peripheral circuitry become small and light, and can be fabricated through recently developed microfabrication techniques. Making use of this advantage, studies of thin film antennacoupled devices working in the millimeter and submillimeter wave regions have been carried out using quasi-optical techniques [13]. In particular, the fabrication of slot antenna-coupled high-sensitivity detectors has been tested by many researchers [47].…”

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

“…One of the devices suitable for millimeter and submillimeter wave systems is a thin film antenna-coupled detector [13]. This device consists of a thin film antenna and a detecting element.…”