Abstract: A metal plate in the form of a strip, bent into a bracket shape, is provided on the surface of a circuit board opposite to the surface of the board facing a human body. The proximal end of the metal plate is connected to a ground pattern provided on the circuit board, close to an antenna power supply point, with the longitudinal direction of the plate adjusted parallel to the main polarization direction of an antenna element.

Abstract: A metal plate in the form of a strip, bent into a bracket shape, is provided on the surface of a circuit board opposite to the surface of the board facing a human body. The proximal end of the metal plate is connected to a ground pattern provided on the circuit board, close to an antenna power supply point, with the longitudinal direction of the plate adjusted parallel to the main polarization direction of an antenna element.

Abstract: A metal plate in the form of a strip, bent into a bracket shape, is provided on the surface of a circuit board opposite to the surface of the board facing a human body. The proximal end of the metal plate is connected to a ground pattern provided on the circuit board, close to an antenna power supply point, with the longitudinal direction of the plate adjusted parallel to the main polarization direction of an antenna element.

Abstract: A mobile communication terminal comprises a first antenna element and a second antenna element. The first antenna element is arranged over the surface of the circuit substrate contained in the terminal cabinet, the surface being located remotest from the ear of the speaker on the phone. The second antenna element is arranged over the remotest surface and adapted to be pulled in the inside of the terminal cabinet or extended from the terminal cabinet, the second antenna element being electromagnetically coupled with one of the ends of the first antenna element in a state of being extended from the terminal cabinet.

Abstract: A flexible substrate having a meandering antenna element and a matching circuit formed thereon is wound within an antenna cap and mounted on a terminal body. A rod-like antenna is arranged extensible within the flexible substrate. If the rod-like antenna is withdrawn, a linear antenna element is coupled by a capacitive coupling with the matching circuit formed on the flexible substrate. Also, if the rod-like antenna is returned into the terminal body, the capacitive coupling between the linear antenna element and the matching circuit is released, and the meandering antenna element is coupled by a capacitive coupling with the matching circuit on the flexible substrate.

Abstract: A mobile communication terminal comprises a first antenna element and a second antenna element. The first antenna element is arranged over the surface of the circuit substrate contained in the terminal cabinet, the surface being located remotest from the ear of the speaker on the phone. The second antenna element is arranged over the remotest surface and adapted to be pulled in the inside of the terminal cabinet or extended from the terminal cabinet, the second antenna element being electromagnetically coupled with one of the ends of the first antenna element in a state of being extended from the terminal cabinet.

Abstract: A metal plate in the form of a strip, bent into a bracket shape, is provided on the surface of a circuit board opposite to the surface of the board facing a human body. The proximal end of the metal plate is connected to a ground pattern provided on the circuit board, close to an antenna power supply point, with the longitudinal direction of the plate adjusted parallel to the main polarization direction of an antenna element.

Abstract: A cellular phone includes two antennas, namely, a first antenna made as a rod antenna and a second antenna made as a helical antenna. A circuit board is housed in the casing of the cellular phone. The circuit board has an extended board portion which is projected upward from the upper edge and which corresponds in position to the antennas. An impedance matching circuit, which is made as a folded wiring pattern, and a feeding pad are formed on the extended board portion of the circuit board.

Abstract: A flexible substrate having a meandering antenna element and a matching circuit formed thereon is wound within an antenna cap and mounted on a terminal body. A rod-like antenna is arranged extensible within the flexible substrate. If the rod-like antenna is withdrawn, a linear antenna element is coupled by a capacitive coupling with the matching circuit formed on the flexible substrate. Also, if the rod-like antenna is returned into the terminal body, the capacitive coupling between the linear antenna element and the matching circuit is released, and the meandering antenna element is coupled by a capacitive coupling with the matching circuit on the flexible substrate.

Abstract: A radio set comprises an antenna which is a &lgr;/2 monopole antenna capacitively coupled to the radio circuit on a circuit substrate by way of a capacitor and powered by the circuit. A ground pattern is formed on the circuit substrate in a region of about &lgr;/2 at the side of the antenna as viewed in the axial direction of the antenna and another ground pattern is formed in the remaining region of about &lgr;/2 and electrically connected to the ground pattern by way of an inductor. The inductance of the inductor is so selected that the phase of the electric current flowing between the ground pattern and the ground pattern is advanced by 180° at the operating frequency of the wavelength &lgr;.

Abstract: A antenna of a mobile station is composed of a first antenna section having a helical section and a first contact and a rod-like second antenna section coupled at its one end to the first contact and having a second contact at the other end. When the second antenna section is housed in the casing, the first contact comes to face the internal surface of a feeding terminal with the result that it is capacitive-coupled with a matching circuit. When the second antenna section is pulled out of the casing, the second contact comes in direct contact with the feeding terminal with the result that it is directly connected to the matching circuit. Thereby, the band of resonant frequencies when the antenna is housed in the casing is widened and the antenna gain when the antenna is pulled out of the casing is improved.

Abstract: A multifrequency antenna, which may be used as a built-in antenna of a small and thin radio communication terminal, such as a mobile telephone, is able to receive radio waves of multifrequency bands without enlarging the shape thereof. The antenna is structured using a main mode resonance frequency and a high-order mode resonance frequency of a single-frequency plane antenna with a short-circuit plate. Specifically, a radiator conductor plate in an optional shape is arranged on a ground plate, and the radiator conductor plate is connected to the ground plate via the short-circuit plate. Power is supplied to the radiator conductor plate from a power-feeding source via a feeder cable. In the radiator conductor plate, a cut portion for shifting the high-order mode resonance frequency to the location at a predetermined distance from the short-circuit plate is formed, and the high-order mode resonance frequency is shifted into a desired band by this cut portion.

Abstract: In a design of the printed circuit board design device, a signal wire name is affixed to each wiring of a circuit, thereby making it quite easy to go through confirmation works after the design works are thoroughly accomplished. The present invention aims at improving efficiency of works for affixing the signal wire name. For this purpose, the signal wire names are input for each desired area of the circuit. By taking full advantage of overlap of the area concerned, the signal wire names connected in serial form are affixed to one wiring. The candidates of the signal wire names to be affixed are tabulated as a list. After the signal wire names are affixed to each wiring of the circuit, the wiring can be retrieved and shown in visible display. In this case too, the candidates of the signal wire names to be retrieved can be tabulated as a list.

Abstract: A multifrequency inverted F-type antenna which can receive muntifirequency band radio waves without the enlargement of its shape. A cut-out part (12b) is formed in an emission conductor (12) one end of which is connected to a short-circuit plate (13) planted in a ground conductor (11) and which has a feeding point (12a) to form on the emission conductor (12) a first emission conductor (12-1) and a second emission conductor (12-2) which resonate at respective frequency bands different from each other. By this construction the radio waves of two different frequency bands, i.e. a first frequency band determined by the shape of the first emission conductor (12-1) and a second frequency band determined by the shape of the second emission conductor (12-2), can be received.