Abstract: A power regeneration device includes an extraction unit and a high frequency-to-DC converter. The extraction unit is provided on a transmission path. The transmission path is provided for transmitting a high-frequency wave from a high-frequency wave source to a high-frequency load. The extraction unit extracts a reflected high-frequency wave generated by reflecting the high-frequency wave from the high-frequency load. The high frequency-to-DC converter converts the reflected high-frequency wave extracted by the extraction unit into DC power.

Abstract: The reflector-provided dipole-antenna shows outstanding performance in a wide frequency range and allows simultaneous transmission and reception at different frequencies. A dipole antenna element is provided at the back of a dielectric substrate set to the reflector surface. A parasitic element is provided on the front of the dielectric substrate, which is constituted by forming and protruding the central portion of a linear conductor forward in an almost trapezoidal shape, for example. The protruded portion is set to a position corresponding to the front of the feed point of the dipole antenna element and the portions of the said parasitic element towards the ends are set to positions corresponding to the rear of the dipole antenna element. A feed circuit provided on the face side of dielectric substrate is connected to a coaxial connector provided at the back of the reflector.

Abstract: Input is applied to a two-partition circuit that substantially equally distributes input power into two partitions having a phase difference of 90.degree., and the thus-distributed output is applied to a first driver that generates circularly polarized wave. The two outputs of the second driver, in which the circularly polarized waves generated from the first driver are coupled, are combined in a combining circuit. The end portion of the opening of the sealed case incorporating the first driver fits together with the end portion of the opening of the sealed case incorporating the second driver such that the two sealed cases together with the first and second drivers may rotate relative to each other around their cylindrical axis. The phase difference between the input of the two-partition circuit and the output of the combining circuit changes according to the relative angle of rotation around the cylindrical axis between first and second drivers.

Abstract: A resonator consists of an external conductor (1), a dielectric plate (2), a resonance capacity element, an input terminal (5), and an output terminal (6). The dielectric plate (2) is fixed at its upper and lower ends to the upper and lower walls, respectively, of the external conductor (1). The resonance capacity element is composed of electrodes of a metal thin layer or a metal plate provided on the front and back of the dielectric plate (2). The lower end of one of the electrodes is electrically connected to the lower wall of the external conductor (1), and a gap is formed between the upper end of the electrode and the upper wall of the external conductor (1), while the upper end of the other electrode is electrically connected to the upper wall of the external conductor (1), and a gap is formed between the lower end of the other electrode and the lower wall of the external conductor (1).

Abstract: A dielectric resonator device comprising a resonator body having a dielectric resonator element of dielectric ceramics, and a supporting member integrally formed with the resonator element and made of the same material as that of the resonator element, the resonator element being provided with an inner hole, if necessary.