Abstract: A multiple antenna includes a ground electrode, a dielectric substrate placed on a top surface of the ground electrode, a planar antenna electrode disposed on a top surface of the dielectric substrate, a feeding terminal electrically coupled to the planar antenna electrode, an upper antenna electrode placed above the planar antenna electrode with a given space in between such that the upper antenna electrode faces the planar antenna electrode; and a feeding section electrically coupled to the upper antenna electrode. The upper antenna electrode has an opening facing the planar antenna electrode.

Abstract: The present invention relates to an apparatus for detecting an object-to-be-printed and aims at providing an apparatus for detecting an object-to-be-printed which is capable of discriminating whether the object-to-be-printed is plain paper or special paper. The apparatus includes an infrared sensor for detecting infrared rays 4 radiated by heating the object-to-be-printed 1 with heating means 2 and is capable of discriminating whether the object-to-be-printed is plain paper or special paper.

Abstract: A recording device capable of accurately detecting the presence and absence of ink particles ejected from plural ejecting outlets aligned in a lateral direction of a head thereof. In the recording device, the sensing field of an infrared sensor is directed toward flying ink particles but directed toward landed particles. Whereby the thermal energy from the landing ink particles remarkably increases a thermal energy applied to infrared sensor.

Abstract: The present invention relates to an infrared detector element to detect infrared rays by means of a pyroelectric material, and an infrared sensor unit and an infrared detecting device using the infrared detector element and has an object of realizing an omnidirectional infrared detector element that can gain an output against an object to be detected moving in whatever directions.

Abstract: A sensor in which a field effect transistor element 3 having a gate electrode 6 on its rear side is electrically connected onto a resistive element 2 having a top surface electrode and a bottom surface electrode in such a way that the gate electrode 6 and a portion of the top surface electrode of the resistive element 2 coincides, and a grounding electrode 12 on a substrate is electrically connected with the bottom surface electrode of the resistive element 2 so that they coincides.

Abstract: The drive section made by bonding the piezoelectric material on part of the elastic shim and the displacement amplifying section which amplifies the amplitude of vibration vibrated in the drive section are provided in the same plane. The device is driven at drive frequencies in a region between the resonance frequency of the drive section and the resonance frequency of the displacement amplifying section.

Abstract: The present invention is a piezoelectric actuator for stabilizing the driving of a small-sized chopper, thereby enhancing reliability of a pyroelectric type infrared ray sensor, wherein actuator is a unimorph type actuator having a piezoelectric element adhered to a shim. The shim and a displacement magnifying part are bound in a U-form. The resonance frequencies due to the vibrations of the unimorph type actuator and the displacement magifying part are brought close to each other wherein the chopper is driven at an intermediate frequency. As a result, a stable displacement magnifying effect is obtained at the front end of the displacement magnifying part.