Abstract: An antenna apparatus coupled to a feeding point arranged on a cavity is disclosed. The apparatus includes a linear element extending from the feeding point and having a physical length that is shorter than a one-quarter wavelength. A half-wave antenna element is connected to an end of the linear element. The apparatus also includes a metal conductor piece including a connecting point between the linear element and the half-wave antenna element and located close to one surface of the cavity. The linear element includes a first portion extending in a first direction opposite to that of the half-wave element from the feeding point and in parallel with one surface of the cavity and a second portion extending in a second direction, which is equal to a direction in which the half-wave antenna element extends, and in parallel with one surface of the cavity.

Abstract: A telescoping antenna (102) has a mast element (200) with first and second ends (204, 222), the first end (204) being mounted on a cellular telephone housing (206) and establishing electrical connection with signal processing circuitry (210) within the cellular telephone (208). The telescoping antenna (102) also has a cylindrical radiating element (202) that slidably engages the mast element (200). In a retracted or stowed position first ends (204, 212) of the mast element (200) and the cylindrical radiating element (202) are substantially adjacent, and second ends (222, 216) of the mast element (200) and the cylindrical radiating element (202) are also substantially adjacent. A loading coil (214) has a first end (218) permanently connected to the second end (216) of the cylindrical radiating element (202) and has a second end (220) engageable with the second end (222) of the mast element (200).

Abstract: A PC card for insertion into a slot of a portable computer or other electronic device, has an antenna that allows the electronic device to send and receive data through radio waves. The antenna is moveable from a stowed position wherein most of the antenna lies in the PC card housing, and a first deployed position wherein most of the antenna projects rearwardly through an opening at the rear of the housing so radio waves can be transmitted and received. The antenna can be mounted on a tray that is moveable forwardly and rearwardly into and out of the rear of the housing. The tray can form a smart card-receiving recess that receives a small smart card to enable connection to pads on the smart card so as to provide authorization for communication through a wireless telephone network.

Abstract: When the antenna is extended, the length of the ½&lgr; whip antenna 102 operates as an antenna thus causing only a negligible quantity of high-frequency currents to flow into the ground for the circuit board 108. When the antenna is housed, the entire length of a ¼&lgr; helical antenna 101 and a ¼&lgr; radial 109 operates as an antenna thus causing only a negligible quantity of high-frequency currents to flow into the ground for the circuit board 108. When the antenna is extended, the second contact 104 makes adjustments so that high-frequency electric signals from the ½&lgr; whip antenna 102 may be transmitted to the circuit board 108 and matching may be provided at the second matching section 106 when the antenna is extended.

Abstract: Disclosed is a power antenna apparatus for automatically extracting/retracting an antenna. A motor is controlled by a control circuit to generate a rotational force. An antenna housing has a guide slot extending longitudinally on an inner surface thereof. A rotary member is installed in the antenna housing and is rotated by the motor. A coil spring is rotatably accommodated in the antenna housing and one end thereof is fixed to the rotary member. An antenna conveying member is received together with the antenna within the coil spring as being fixedly coupled with the antenna by a lower end of the antenna. The antenna conveying member has protrusions which are loosely inserted into the guide slot of the antenna housing and conveys the antenna along with the guide slot to extract or retract the antenna by means of a rotation of the coil spring. Other embodiments are disclosed for flexible installation of the apparatus. Application of the apparatus to a wireless telephone is also disclosed.

Abstract: An external thread portion of an antenna holder (12), mounted on an antenna body (11), is connected to an internal thread portion of an antenna holder-receiving member (15) provided on an antenna guide (18), and in this connected condition, an antenna is passed through an antenna body passage hole (17) formed in a casing (13). Then, a fastening member (19) is mounted in a fitting portion (20), which is formed in the casing (13) so as to fix the antenna, and is disposed in the vicinity of the antenna body passage hole (17), thereby fixing the antenna. Therefore, the antenna can be mounted and fixed without using much labor and time.

Abstract: The invention relates to an antenna with a rod and an antenna head, which antenna is telescopic within a guiding tube having a zone of electric contact with the circuits associated with the antenna. The extremity of the tube is either closed by a plug provided to round the shape of the extremity, or deformed, for example by hot deformation, so as to give it a rounded shape. In either case, the realization is very simple, efficient and inexpensive and may be used in any electronic signal transmission system comprising a telescopic antenna for the transmission and/or reception of these signals.

Abstract: A multiple band antenna assembly for a portable hand held communication device. The antenna assembly includes a fixed multiple band base antenna element and a whip antenna which can be adjusted between extended and retracted positions. The whip antenna includes a telescoping metal portion having a length selected to achieve resonance in multiple frequencies. In the extended position, the whip antenna is electromagnetically coupled to the base antenna element without metal to metal contact. The antenna is mechanically simple and requires only a single port for multiple band operation.

Abstract: A compact, simple to install dipole antenna that has a base composed of a molded plastic mass in the shape of a modified D-shape and having a flat face. A pair of spaced, coaxially aligned brass cores are encapsulated in the plastic mass of the base with threaded portions of the cores projecting axially out of the plastic mass of the base. A coaxial cable, having an outer conductor and an inner conductor, has one end encapsulated in the plastic mass of the base. Connectors directly connect the outer conductor of the coaxial cable to one of the brass cores, and the inner conductor with the other brass core. A pair of telescoping brass pole elements are threadedly mounted on the threaded projections.

Abstract: A multi-position antenna assembly for use in portable wireless communication devices is disclosed. The assembly includes an antenna, a printed circuit board operative to electrically couple the antenna to a host device, a disk joint assembly, coupled to the antenna, operative to rotate the antenna about two axes of rotation, and an assembly housing which at least partially contains the printed circuit board and the disk joint assembly, and is adapted to be removably coupled to the host device. The disk joint assembly includes a joint housing having a projection piece which passes through the joint housing that enables the antenna to be positioned between alternating operating and storage positions within a PC card.

Abstract: A helical antenna having a simple structure and being made of cheap conductor to reduce the manufacturing cost, and a manufacturing method thereof. A helical antenna comprises a dielectric core, a conductive strip, a feeding conductor, and an external circuit. The dielectric core has a substantially cylindrical shape with an outer circumferential surface on which a spiral groove is formed. The conductive strip is deposited on the groove of the dielectric core. The feeding conductor is placed under the dielectric core and provides an electrical connection between the conductive strip and an external circuit. The antenna cover encloses the dielectric core and the feeding conductor.

Abstract: A switch body has a wiper switch unit installed with a wiper operation lever, and a turn signal switch unit installed with a turn signal operation lever installed respectively therein. The switch body also has a CPU, a keyless reception circuit and an anti-burglar amplifier circuit incorporated therein. An antenna for the keyless reception circuit located within the wiper operation lever also functions as an antenna for the anti-burglar amplifier circuit.

Abstract: Preparations of piece parts used in coupling a joint and a feeding fixture together and the assembly work involved are made easy and a less expensive antenna can be realized. The antenna disclosed here includes a case of a wireless device, a holder mounted on the case, a first antenna element accommodated in the holder so as to be freely movable by sliding, a stopper coupled with one end of the first antenna element and connected electrically to the holder by sliding, a cylindrical column like joint formed of an insulating resin and fixed to the other end of the first antenna element, a tubular feeding fixture formed of a metal, electrically connected with the holder by sliding and put in place sheathing the joint, and a second antenna element electrically connected to one end of the feeding fixture.

Abstract: Dual band retractable antenna system with capacitive coupling includes a helical antenna for operating at stand-by mode, the helical having ¼ wavelength; a whip, which penetrates the helical, for operating at busy mode, the whip having ¼ wavelength; a stopper for catching the whip when the antenna is extended out; a sleeve mounted to one end of the helical, for operating as a feed point when the whip is extended out; a capacitive coupling arrangement placed between the helical and the sleeve, for capacitively coupling the helical to the sleeve; and a matching circuit connected between the sleeve and the antenna system, so that the antenna system operates for both frequency bands.

Abstract: A mechanism for extending and retracting an antenna in a portable phone. A driving motor is provided and has a motor shaft around which a worm is fit, a worm gear is engaged with the worm of the motor shaft, and a pulley arrangement is provided which includes a roller shaft which connects the worm gear to a first pulley roller, a timing belt that transfers the force of the first pulley roller to a second pulley roller. A driving roller and a driven roller receive the force from the second pulley roller, and an antenna rod is disposed between the driving and driven rollers, to be extended/retracted by the driving and driven rollers. A first main bracket is provided which has a space for holding the driving motor, a first free end for supporting the worm gear, and a second free end for supporting the driving roller.

Abstract: The invention relates to an antenna array used with a wireless subscriber unit. The antenna array can have a plurality of antenna elements attached to a housing. Expanding or collapsing the housing can move the antenna elements into an expanded or a collapsed state, respectively.

Abstract: A holder is eliminated when installing an antenna to a radio case, the installation operation is simplified, and a feeding mechanism is improved. A slit is provided in a stopper of an antenna so that the outer diameter can be reduced, and the antenna is inserted directly into a cylindrical section of the radio case from the bottom of the stopper. A plate-like feeding spring is provided at the cylindrical section, and is directly attached to a connection point of a circuit substrate of a radio; one end of the plate-like feeding spring pressingly contacts the side of the stopper of the antenna, thereby forming a feeding mechanism.

Abstract: A retractable antenna unit for a mobile phone including an antenna housing provided in the casing of the mobile phone, a helical antenna installed in the antenna housing, a whip antenna having an upper end provided with a knob and a lower end provided with a stopper, the stopper being also provided with a feeder part, and a metal tube for supplementing the length of the helical antenna when the whip antenna is completely retracted into the antenna housing, or serving to extend the operational length of the whip antenna when the whip antenna is completely extended from the antenna housing, whereby the wave feed position of the whip antenna is raised when the whip antenna is completely extended from the antenna housing.

Abstract: An antenna assembly has a shaft element with first and second ends. The antenna assembly also has a tube-like element disposed about the first end of the shaft element which tube-like element acts as a matching structure for the antenna assembly and strengthens and rigidifies the antenna assembly to resist bending of the shaft element proximate to the first end thereof. The antenna assembly further has a dielectric material disposed between the tube-like element and the shaft element at the first end. Moreover, the antenna assembly may be combined with a housing to form a radio-communication assembly, the housing having a surface with an edge, the tube-like element acting as a matching structure and strengthening and rigidifying the antenna assembly to resist bending of the shaft element at a fulcrum defined by the edge. Furthermore, a method reconfiguring an antenna on a radio-communication assembly is provided.

Abstract: A FM multiple signal receivable navigation apparatus is disclosed. A GPS signal receiving antenna unit and a GPS signal receiver unit are electrically connected by a coaxial cable. One end of the coaxial cable is connected with the GPS signal receiving antenna unit, and the other end of the cable is connected with the GPS signal receiver unit through a connector. A shield conductor of the coaxial cable is served as a FM multiple signal receiving antenna. The shield conductor is connected with a FM multiple signal receiver unit through a noise reduction member. The connector can be replaced by a PCMCIA (Personal Computer Memory Card International Association) card.

Abstract: An automatic antenna for a multiband mobile communication terminal. The automatic antenna comprises a microstrip antenna mounted on an upper part of a housing of the mobile communication terminal, the microstrip antenna having at least two microstrip line parts for different frequency signals; a motor with a toothed wheel mounted on a shaft thereof; a whip antenna having sawteeth formed on a side thereof, wherein the sawteeth are engaged with the toothed wheel to extend and retract the whip antenna by a rotation force of the motor; a feeder electrically connected to a main board of the mobile communication terminal and the microstrip antenna, the feeder being electrically connected to the whip antenna by coupling effect; an insulating tube along which the whip antenna is movable, for preventing antenna radiation of the whip antenna; and an antenna support for supporting the whip antenna.

Abstract: An extendable antenna for a personal computer card uses two main antenna elements. A movable antenna element can be positioned in an extended position such that the base of the second antenna element electrically contacts the top of the other antenna element. The antenna in the extended position is connected to the antenna port through matching circuitry. In a closed position of the antenna, the second antenna element is electrically connected to the antenna port bypassing the matching circuitry. In one embodiment, the antenna is a quarter-wave length antenna in the closed position and a half-wave length antenna in the extended position.

Abstract: Extendable/stowable antenna apparatus includes a molded elongated antenna stem with fixed and free ends. The stem is molded with an outer bearing surface, anti-rotation surfaces extending between the fixed and free ends, and a detent surface including a detent stow slot and a detent extend slot. A molded antenna radome includes an elongated opening molded therein with a mating inner bearing surface and anti-rotation surfaces designed to mate with the outer bearing surface and the anti-rotation surfaces of the stem. The opening slidably engages the stem for sliding movements between a stow position and an extended position at the free end. A spring biased detent mechanism in the opening engages the detent stow slot in the stow position and the detent extend slot in the extended position.

Abstract: A dual radiator galvanically coupled antenna for a portable communication device. The antenna includes separate elongate and upper radiators that respectively galvanically couple to phone circuits in extended and retracted states. An insulator, preferably thermoplastic, mechanically connects and electrically separates the elongate and upper radiators. In a preferred embodiment, a shaped conductor provides an electrode with a cup having a thinned wall which crimps onto an end of an upper helical radiator to make electrical contact thereto. The shaped conductor also forms an exposed galvanic electrical contact, and an enlarged knurled portion for mechanical connection to the insulator. A separate enlarged galvanic contact is formed at a terminal end of the elongate conductor. An additional preferred embodiment includes an upper rod galvanically coupled to the electrode and electrically parallel with the helical radiator.

Abstract: An antenna device for portable communication equipment and including an extendable elongated antenna element which at its lower part includes first and second contact surfaces and which is slidable inside a casing between an extended position and a retracted position. The first and second contact surfaces are arranged for engagement with an inner surface of the casing, and a third contact surface is arranged for engagement with the elongated antenna element. The contact surfaces are arranged so as to create a spring force in the elongated antenna element so as to achieve mechanical locking in the extended position.

Abstract: In a multi-band antenna (10) being provided with an antenna element having an LC parallel resonance circuit (3) and a first and a second radiation element (1,2) connected to opposite ends of the LC parallel resonance circuit, the LC parallel resonance circuit is constituted by self-resonance of an inductor itself. A telescopic whip antenna may be constituted by combining a small-size antenna and a whip antenna which is receivable in a radio device casing and expandable.

Abstract: A wireless device has a main housing and an antenna housing rotatably mounted on the main housing for rotation between a first, stored position alongside the main housing and at least one operative position. The antenna housing has a tubular extension projecting away from the first axis. A telescoping antenna element is slidably mounted in the tubular extension for telescoping movement between a retracted position and a deployed position extending out of the tubular extension as the antenna housing rotates between the first and operative positions. A flexible member secures the antenna to a rotatable actuator within the antenna housing for pushing the antenna element back and forth between its two positions as the antenna housing is rotated.

Abstract: An antenna device for a radio communication apparatus. The antenna device includes a rod antenna and a helical antenna, both of which are connectable to a transceiver. The helical antenna has an active state for receiving an emitting electromagnetic energy, and a passive state. The helical antenna is transferable from the active state to the passive state by axial compression. Preferably, the helical antenna is axially compressed into the passive state when the rod antenna is moved to an active position.

Abstract: An antenna assembly for reducing the receiving space in a portable phone which employs the antenna assembly and for enhancing the bandwidth and radiation efficiency when the antenna assembly is in a retracted position. The antenna assembly includes a helical antenna and a whip antenna. The helical antenna is powered by capacitive coupling between a conductive layer therein and a feed conductor electrically connected to a signal processing circuit in the portable phone. Also, the whip antenna consists of two stages in a vertical direction in a manner that one of the stages can be retracted into the other one. The helical antenna includes a conducting layer disposed beneath the helical element; the feed conductor electrically connected to the signal processing circuit at least when said antenna assembly is retracted into the portable phone; and an insulating layer disposed between the conducting layer and the feed conductor.

Abstract: An antenna assembly for a cellular telephone reduces electrical signal interference caused by the close proximity of the antenna to the user's head. The antenna assembly includes a coil antenna mounted on the top of a telescoping rod member. Only the coil antenna is adapted for transmitting and receiving electrical signals. The coil antenna is electrically connected, via a coaxial cable, to a telephone transceiver circuit board. In operation, the telescoping rod member is extended until the coil antenna is positioned at a height above the user's head to minimize the transmission of electrical signals toward the user's head.

Abstract: A novel antenna arrangement enables the fully automated insertion of an antenna assembly in a communication device (100), such as a cellular radio telephone. A mounting bracket (112) for the antenna assembly is designed to stand in place to enable reflowing of solder to attach the mounting bracket to the circuit board. According to another aspect of the invention, the sleeve (130) and corresponding head (132) of the antenna assembly operatively couple to enable insertion of the sleeve into the mounting bracket, while preventing removal of the sleeve with the head. Preferably, the lower surface of the head is designed to enable the clockwise rotation of the sleeve, while preventing the counterclockwise rotation of the sleeve. Also, the sleeve is designed to receive a removal device to rotate the sleeve in the counterclockwise direction for removal.

Abstract: Corresponding to a connector for an external antenna arranged at a bottom end portion of a housing of a portable telephone, a RF transmitter-receiver circuit and a feeding spring are provided in a lower part of a circuit substrate, electric power is supplied to a bottom end portion of a rod antenna longer than .lambda./4, and a supporting fitting arranged at a top end portion of the housing, for contacting the intermediate portion of the rod antenna is connected to a ground of the circuit substrate through a ground spring, whereby a portion of the rod antenna above the circuit substrate stably operates as a .lambda./4 mono-pole antenna.

Abstract: A retractable antenna is provided for a wireless communication device such as a wireless modem, two-way radio, cellular telephone, etc., wherein the extended length of the antenna is greater than the height of the telephone housing. The antenna includes components which are slidably mounted with respect to one another so that the antenna may be collapsed and retracted within the telephone housing.

Abstract: An antenna arrangement for a portable radiotelephone (100) is disclosed. In particular, the antenna arrangement generally includes a movable antenna element movable between an extended position and a retracted position, a movable contact (243) movably coupled to a bottom portion of the movable antenna element, the movable contact being movable between an extended position and a retracted position, and a circuit board having a first contact element (236), and a second contact element (238) coupled to ground, the first contact element receiving the movable contact when the movable antenna element is in an extended position, and the second contact element receiving the movable contact when the movable antenna element is in a retracted position for terminating the antenna.

Abstract: This invention relates to an antenna operable in a multi-mode radio transceiver. One aspect of the present invention, provides a radio antenna having resonant frequencies operable to receive and transmit radio signals in different frequency bands according to two operating protocols. In accordance with another aspect of the invention the antenna is operable according to more than two operating protocols and frequency bands. In accordance with another aspect of the invention, there is provided a method of operating the antenna.

Abstract: An antenna mast and method of using it relate to a retractable mast having a retractable mast having a plurality of tubular telescoping sections to enable the mast to move between a fully retracted storage position and a fully extended use position. Each section is equipped with a thermoplastic bearing to facility rapid deployment. Pairs of diametrically opposed pulley mechanisms are mounted on opposite sides of each one of the sections, and the pairs of pulleys are angularly displaced from section to section for facilitating the structural stability of the deployed mast.

Abstract: A retractable antenna for a portable communication device. The antenna retracts to a size within a portable communicator, such as a cell phone, which is smaller than the extended size of the antenna, while being flexible and otherwise suitable for the demanding environment of portable communicators. The antenna includes a contact sleeve which moves relative to an elongated conductor of the antenna, and also moves with the antenna while allowing the antenna to maintain electrical contact with another element in the antenna or the communicator. The sleeve may be connected to a helical conductor which forms part of the antenna and remains outside the housing of the portable communicator. Alternatively, the sleeve may be conductive on its inner and outer portions to move with and connect the elongated conductor to separate retracted and extended contact points within the portable communicator.

Abstract: An antenna is provided for a wireless communication device such as a handheld radio or cellular telephone. The antenna may be either embedded internally in the transceiver or may be mounted externally thereof. The antenna comprises a pair of 1/4 wave radiating elements which are coupled out of phase to create an end fire bi-directional pattern for the antenna. The radiating elements are attached to a micro-strip transmission phasing device which is comprised of a center conductor, a ground plane and a substrate material. The micro-strip transmission phasing device supplies a zero degree to one hundred eighty degree phase shift from one radiating element to the other radiating element.

Abstract: The invention relates to an antenna device for portable radio equipment such as mobile telephones (10) and a method for producing the antenna device. Mobile telephone antennas should have good receiving sensitivity and at the same time be compact. An antenna which can be folded down, folded up or retracted into a mobile telephone becomes compact but the receiving sensitivity becomes bad. A solution is an antenna device which comprises two antennas, a primary antenna (11) and a secondary antenna (12). The primary antenna can take up two positions and is always connected to the radio circuits (16) of the mobile telephone. The secondary antenna is a small and compact antenna. When the mobile telephone is in the paging position, the primary antenna is placed in the folded down, folded up or retracted-in position, wherein the secondary antenna is also connected to the radio circuits. The two antennas form an antenna device which has good receiving sensitivity and is compact.

Abstract: A radiofrequency antenna including a connector (3; 10) for mechanically and electrically connecting the antenna to the radio set and a fat monopole radiator (2; 11) forming a substantially integrated piece (1). The antenna may comprise a second antenna element (5), which is movable in relation to the integrated piece formed by the connector and the fat monopole radiator. The second antenna element is preferably a whip component, for which there is an axial aperture (7) defined in the connector and in the fat monopole radiator. The whip component may be locked in the upper position at different points (8, 8') in the aperture.

Abstract: A telescopic rod antenna apparatus of the present invention includes a mechanism for extending/retracting a telescopic antenna element by operating a smallest-diameter one of rods of the antenna element, and a means for setting the rods in the second state where a tip portion of a largest-diameter rod contacts an O-shaped ring seal means and then extending the antenna element using the mechanism, setting the rods in the second state where the antenna element is retracted using the mechanism, and displacing the second state to the first state where the largest-diameter rod is returned to the initial position of a holding tube to bring a top portion into contact with the O-shaped ring seal means.

Abstract: A retractable antenna for a wireless communication device such as a cellular telephone including a housing having a receptacle at the upper end thereof which is RF coupled to the telephone circuitry. The antenna comprises a metal connector which is RF coupled to the housing receptacle. Telescoping first and second radiators are slidably mounted in the metal connector and may be moved from a fully extended position to a fully retracted position. A helical antenna is operatively supported by the metal connector and is RF insulated therefrom. When the antenna is in its fully retracted position, the helical antenna is in circuit, with the telescoping radiators being out of circuit. When the antenna is in its fully extended position, the telescoping radiators are in circuit and the helical antenna is out of circuit. The overall length of the antenna, when in its fully extended position, is greater than the height of the telephone housing.

Abstract: An antenna that comprises a rod, a movable coil, and a holding section which holds the movable coil in a manner that allows the movable coil to slide in and out of the holding section. When the movable coil is drawn into the holding section, the holding section tunes to a particular desired frequencies in the upper portion of the VHF band and the UHF band; for example, 144 MHz and 430 MHz. When the movable coil is out of the holding section, the holding section, the rod, and the portion of the movable coil outside the holding section form antenna element of a center-loading type that tunes to frequencies in the HF band and the lower portion of the VHF band; for example, frequencies in the range of 3MHz to 50MHz. The tuning frequency is varied by sliding the position of the coil.

Abstract: A capacitive coupled extendable antenna for portable radio communication devices with improved operating characteristics is disclosed. The extendable antenna includes a quarter-wavelength helical antenna, a quarter-wavelength whip antenna movable between the extended position and the retracted position through the helical antenna, and an electrically conductive sleeve acting as the feed point of the antenna. The helical antenna is electrically insulated from the sleeve so that the helical antenna is capacitively coupled to the sleeve. The whip antenna is enclosed within an insulating tube, which is disposed within a guide for longitudinal movement therethrough. The whip antenna is disposed in electrically insulated relation to the sleeve in the retracted position and electrically connected to the sleeve in the extended position via a stopper.

Abstract: A telescopic rod antenna according to the present invention includes an antenna element and a waterproof ring-shaped seal member which is inserted in a ring-shaped gap in a joint between two rods of the antenna element. The ring-shaped seal member is obtained by shaping a thermoplastic resin film strip, on which at least one projecting portion is formed in its longitudinal direction, like a ring and compressing and inserting a ring-shaped film into the ring-shaped gap. A plurality of ring-shaped contact portions are formed on both sides of the film strip in its longitudinal direction while the projecting portion of the film strip serves as a basic contact portion. The ring-shaped contact portions are adhered to the inner surface of the larger-diameter rod and the outer surface of the smaller-diameter rod at a predetermined pressure.

Abstract: A radiotelephone matching switching system and associated antenna and printed circuit board contact configurations for a retractable antenna employs at least two contacts which are traversely spaced apart in the radiotelephone housing so as to reduce the space used therein. One embodiment also allows reactive components of the circuit to be disconnected thereby increasing the operational bandwidth of the radiotelephone.

Abstract: A radio device comprising a housing having an opening and a retaining surface, an antenna support sleeve inserted in the opening and a rod antenna mounted for sliding movement in the antenna support sleeve between extended and retracted positions, the antenna including a stop surface the sleeve including a first resilient, inwardly-directed member which abuts the stop surface when the antenna is in its fully extended position to block sliding removal of the antenna from the sleeve, the first member being outwardly displaceable using a tool to allow the stop surface to be slid past the first member and thereby enable sliding removal of the antenna from the sleeve and a second resilient member which engages the retaining surface to prevent removal of the sleeve from the housing.

Abstract: In a portable radio communication apparatus, a matching circuit is electrically connected to an antenna when the antenna is retracted into a casing. In this condition, the antenna and a feed circuit are matched as desirably as when the antenna is extended from the casing.

Abstract: In an integrated telescoping mast-payload assembly, the payload forms the top telescoping section.