Abstract: A ground contact plate in a contact unit includes fixing pieces provided at predetermined equal intervals in a longitudinal direction. The fixing pieces are respectively fitted in opposed slits in ground contact terminals via a transmission blade.

Abstract: A ground contact plate in a contact unit includes fixing pieces provided at predetermined equal intervals in a longitudinal direction. The fixing pieces are respectively fitted in opposed slits in ground contact terminals via a transmission blade.

Abstract: The present invention provides a card edge connector as a high-speed differential signal connector configured to equalize electric potentials of ground contacts adjacent to signal line contacts, and thus to reduce crosstalk between adjacent signal line contacts. The card edge connector serves as a female connector in which multiple signal line contacts and multiple ground contacts are arranged in parallel in at least one row. In the card edge connector, the signal line contacts and the ground contacts are arranged in a way that every two signal line contacts for high-speed signals to send and return respectively therethrough are interposed between two ground contacts, and all of the multiple ground contacts arranged in the one row are electrically connected to one another by use of a common contact.

Abstract: The present invention provides a card edge connector as a high-speed differential signal connector configured to equalize electric potentials of ground contacts adjacent to signal line contacts, and thus to reduce crosstalk between adjacent signal line contacts. The card edge connector serves as a female connector in which multiple signal line contacts and multiple ground contacts are arranged in parallel in at least one row. In the card edge connector, the signal line contacts and the ground contacts are arranged in a way that every two signal line contacts for high-speed signals to send and return respectively therethrough are interposed between two ground contacts, and all of the multiple ground contacts arranged in the one row are electrically connected to one another by use of a common contact.

Abstract: The present invention is to provide each of pairs of transmission contact terminals in contact units are arranged between each of two adjacent ground contact terminals. A pair of shielding pieces of each of contact plate is formed to separate fixed terminal portions of the pair of transmission contact terminals of one of the contact unit from those of the adjacent one of the contact unit.

Abstract: The present invention is to provide each of pairs of transmission contact terminals in contact units are arranged between each of two adjacent ground contact terminals. A pair of shielding pieces of each of contact plate is formed to separate fixed terminal portions of the pair of transmission contact terminals of one of the contact unit from those of the adjacent one of the contact unit.

Abstract: A coaxial connector comprises a contact electrically connected with a core of a coaxial cable, a shell electrically connected with a shield of the cable, and a housing that supports the contact and insulates the contact from the shell. The capacitance between the portion consisting of the contact and the part of the core connected thereto together with an insulator exposed out of the shield, and the shell, is adjusted by a capacitance adjustment plate so that the coaxial cable has characteristic impedance of a predetermined value.

Abstract: A board-to-board electrical connector is so constructed that when connectors 2 and 3 are fitted to each other, capacitive coupling plates 24 and 34 are brought into the state in which they partly confront each other, with a space between each other, and also a coupling capacitance between the capacitive coupling plates 24 and 34 is adjusted by adjusting an area formed by partly confronting portions of the capacitive coupling plates 24 and 34 and a distance between the partly confronting portions of the capacitive coupling plates 24 and 34. With this construction, the board-to-board electrical connector having a specified band-pass characteristic is achieved.

Abstract: A connector unit for a high frequency radio apparatus having a housing, a first internal antenna, a radio unit, and an external antenna. The connector unit includes: a printed board having a first microstrip line and a second microstrip line; a fixed contact provided on the printed board; a movable contact provided on the printed board; and a socket. In the connector unit, when the external antenna is inserted into the socket, a distal end of the external antenna enters between the movable contact and fixed contact, and abuts on and presses the movable contact to separate it from the fixed contact. In contrast, when the external antenna is drawn from the socket, the movable contact abuts on the fixed contact. Thus, an antenna switching mechanism can be realized with a simple configuration. The first internal antenna and external antenna can be used in an optimum condition.

Abstract: A coaxial connector comprises a contact electrically connected with a core of a coaxial cable, a shell electrically connected with a shield of the cable, and a housing that supports the contact and insulates the contact from the shell. The capacitance between the portion consisting of the contact and the part of the core connected thereto together with an insulator exposed out of the shield, and the shell, is adjusted by a capacitance adjustment plate so that the coaxial cable has characteristic impedance of a predetermined value.

Abstract: A connector unit for a high frequency radio apparatus having a housing, a first internal antenna, a radio unit, and an external antenna. The connector unit includes: a printed board having a first microstrip line and a second microstrip line; a fixed contact provided on the printed board; a movable contact provided on the printed board; and a socket. In the connector unit, when the external antenna is inserted into the socket, a distal end of the external antenna enters between the movable contact and fixed contact, and abuts on and presses the movable contact to separate it from the fixed contact. In contrast, when the external antenna is drawn from the socket, the movable contact abuts on the fixed contact. Thus, an antenna switching mechanism can be realized with a simple configuration. The first internal antenna and external antenna can be used in an optimum condition.

Abstract: A contact 4 for a PGA socket 1 is formed with a plate-like base portion 41, a pair of projecting portions 42a, 42b provided continuously at one end of the base portion 41 to extend in a direction substantially equal to the base portion, a turned portion 43 provided continuously at the other end of the base portion 41 to face the base portion 41, and a tail portion 44 provided continuously at the other end of the base portion 41 not to face the base portion 41. The turned portion 43 is provided with a contact portion 43a contacting a pin of a PGA package on a surface of the turned portion 43 not facing the base portion 41. This prevents flux from adhering on the contact portion 43a of the contact 4 when the contact 4 is soldered on a board.

Abstract: A contact 4 for a PGA socket 1 is formed with a plate-like base portion 41, a pair of projecting portions 42a, 42b provided continuously at one end of the base portion 41 to extend in a direction substantially equal to the base portion, a turned portion 43 provided continuously at the other end of the base portion 41 to face the base portion 41, and a tail portion 44 provided continuously at the other end of the base portion 41 not to face the base portion 41. The turned portion 43 is provided with a contact portion 43a contacting a pin of a PGA package on a surface of the turned portion 43 not facing the base portion 41. This prevents flux from adhering on the contact portion 43a of the contact 4 when the contact 4 is soldered on a board.

Abstract: A contact 4 for a PGA socket 1 is formed with a plate-like base portion 41, a pair of projecting portions 42a, 42b provided continuously at one end of the base portion 41 to extend in a direction substantially equal to the base portion, a turned portion 43 provided continuously at the other end of the base portion 41 to face the base portion 41, and a tail portion 44 provided continuously at the other end of the base portion 41 not to face the base portion 41. The turned portion 43 is provided with a contact portion 43a contacting a pin of a PGA package on a surface of the turned portion 43 not facing the base portion 41. This prevents flux from adhering on the contact portion 43a of the contact 4 when the contact 4 is soldered on a board.

Abstract: Contacts 4 are held by a base housing 2 so that a whole body of each of the contacts 4 may be substantially housed in a contact hole 21 of the base housing and a surface 42a of a tail portion 42 of each of the contacts 4 may be on a plane substantially equal to a surface 2a of the base housing 2. Reduction in thickness of PGA sockets is hereby realized.

Abstract: An eccentric member 5 having a first shaft portion 51 provided with a concavity 51a and an eccentric portion 52 having a medial axis different from a medial axis of the first shaft portion 51 and formed continuously at one end of the first shaft portion 51 is used. The concavity 51a has a concavity with a boundary line dividing the concavity 51a into a rectangular shape on a surface of the first shaft portion 51. A tip portion of a flat blade screwdriver is fitted in the concavity 51a and the flat blade screwdriver is rotated to slide the cover housing 3 over the base housing 2.

Abstract: A housing is disclosed, which includes a housing main body for containing a contact connected with a central conductor of a coaxial cable, a housing lid formed such that one side of an upper edge portion of the housing main body constitutes a fixed end thereof, for covering an upper side of the contact by being bent to fold at the fixed end such that a free end side thereof is brought into contact with other side of the upper edge portion of the housing main body, and a first latching mechanist formed at the other side of the upper edge portion of the housing main body and the free end side of the housing lid for maintaining a state of bringing the housing lid and the housing main body into contact with each other.

Abstract: An oscillator includes an oscillation circuit unit and an amplification circuit unit of the common-base type. The oscillation circuit unit includes an oscillation transistor and a resonance circuit, the collector of the oscillation transistor being grounded via a first capacitor. The amplification circuit unit includes an amplification transistor, the emitter thereof being directly connected to the collector of the oscillation transistor and the base thereof being grounded via a second capacitor. The resonance circuit is connected between the base of the oscillation transistor and the ground. An oscillation signal output from the collector of the oscillation transistor is input to the emitter of the amplification transistor while partially being bypassed to the ground via the first capacitor. Negative feedback is provided to the amplification transistor in association with the second capacitor.

Abstract: A housing is disclosed, which includes a housing main body for containing a contact connected with a central conductor of a coaxial cable, a housing lid formed such that one side of an upper edge portion of the housing main body constitutes a fixed end thereof, for covering an upper side of the contact by being bent to fold at the fixed end such that a free end side thereof is brought into contact with other side of the upper edge portion of the housing main body, and a first latching mechanism formed at the other side of the upper edge portion of the housing main body and the free end side of the housing lid for maintaining a state of bringing the housing lid and the housing main body into contact with each other.

Abstract: A contact 24 and a conductor plate 26, 27 are held in the housing 21 so that portions of the contact 24 except its end portion 24a and the plate 26, 27 can be put in a parallel relation to each other. Also, a contact 34 is held in the housing 31 so that when the connector 2 and 3 are fitted to each other, portions of the contact 34 except its end portion 34a and the plate 26, 27 can be put in a parallel relation with each other. Further, the end portions 24a and 34a are so shaped that the distance between the signal line formed by the contacts 24 and 34 and the plate 26, 27 can be kept substantially uniform. This can provide a stabilized impedance of the signal line formed by the contacts being contacted with each other.