Abstract: A Proximity Coupled-Folded-J Antenna PC-FJA (104) includes a ground plane (240), first resonant element (352) with a “J” shape that resonates at a first radio frequency, a second resonant element (350) positioned within the “J” shape and that resonates at a second radio frequency, and a third resonant element (118) with a portion that is substantially parallel to and removed from the plane of the “J” shape and that resonates at a third radio frequency. The PC-FJA (104) has a fourth resonant element (130) with a loop (132) in a plane perpendicular to and removed from the plane of the “J” shape. The fourth resonant element (130) resonates at a fourth radio frequency. These elements are ohmically coupled to a connection arm (108). The ground plane (240) is removed from PC-FJA (104) and is perpendicular to the plane of the “J” shape.

Abstract: A multiband element antenna (120) used in combination with a unique metal chassis design that enhances antenna performance and that enables the design of a compact and efficient antenna system. A cellular flip phone (100) that has a conductive chassis includes a flip up antenna (120) that pivots between an extended and a retracted position. The antenna (120) pivots at a point that is located on one edge of the top of the cell phone body (102). The conductive chassis of the flip cover (104) is grounded to the flip phone body (102) at a single point or single surface that is substantially opposite the antenna RF feed (122). Conductive surfaces of the cellular flip phone body (102) are grounded at a single point that is near the antenna RF feed point (122). This grounding arrangement has been found to control the flow of induced currents on the conductive portions of the flip cover (104) and body (102), thereby improving the performance of the device's antenna (120).

Abstract: A wireless communication device (200) is provided, the wireless communication device (200) can include at least one antenna (240), the antenna (240) positioned beneath the face plate (252) and base plate (255) of a user interface (245) of the wireless communication device (200) in which the antenna (240) can be configured to communicate with a signal source.

Abstract: An assembly (200) includes a base assembly (202), a first flip assembly (206) hingeably coupled to the base assembly, a second flip assembly (210) hingeably coupled to the first flip assembly, an antenna (102) carried by the second flip assembly, and a communication device (104) coupled to the antenna.

Abstract: A Parasitic Element (202) for use in combination with a Planer Inverted “F” Antenna (PIFA) (100) that creates an additional band of efficient operation for the combined antenna structure (200). The parasitic element (202) is able to be made to conform to surfaces (704) that are near the PIFA, such as of a case (704) of a cellular telephone (706). The parasitic element (202) is positioned so as to radiantly couple with the PIFA (100) in order to create the additional band of efficient operation. A parasitic element (202) is used with a dual band PIFA that operates in two RF bands, such as in the region near 800 MHz and 1.9 GHz, and adds a third band such as in the region near 1.575 GHz to support reception of Global Positioning System signals. This parasitic element (202) can conform to a case (704) of the cellular telephone (706).

Abstract: A communication device 10 and a corresponding method are arranged for changing the radiation pattern of an antenna 14, where the radiation pattern of the antenna 14 is set to a half-space pattern if the communication device 10 is in close proximity to an object. A reflector 18 is activated to produce the half space radiation pattern. The reflector 18 is deactivated to produce the full space pattern. A switching device 26 determines the state of the reflector 18. A sensing and control device 23 controls the state of the switching device 26.

Abstract: A communication device (100, 500, 800) includes a housing (115) and an antenna system. The housing (115) comprises at least one metallic portion (110) and at least one non-metallic portion (105). The antenna system is for tuning the communication device (100, 500, 800) to radiate at one or more frequencies. The antenna system is located within the non-metallic portion (105) of the housing (115).

Abstract: A radio receiver self test system (10) that can test a plurality of bands in duplex cellular phones and other duplex communication devices can be constructed so that it operates during idle time slots. The system can be configured to test the performance of the radio receiver at all ranges of signal levels and in all channels. The system can include a receiver (14) and a transmitter (12) coupled to an antenna (28) and an antenna/noise switch (16). The switch can have as an input, a noise source (18) such as a broadband or thermal noise source. A baseband upconverter/downconverter module (24) can include a processor that provides control signals (27 and 26) for controlling the level of the noise source and for controlling the switch. The system can further include linear amplifier (20) on a receive path and a power amplifier (22) on the transmit path.

Abstract: A portable communication device includes a first communication subsystem (102) and a second communication subsystem (104). The two communication subsystems operate in different frequency bands and use a common antenna structure. The antenna structure includes a fixed antenna element (110) and a retractable antenna (114) that may be electrically coupled to the fixed antenna element when moved to a fully extended position. The retractable antenna changes the impedance characteristics of the antenna structure substantially at the frequency used by the second communication subsystem, so a matching network (108) is switched in or out of the path between the second communication subsystem and the diplexer. A position detecting circuit (116) and switch controller (118) control operating of the matching network (108) depending on the position of the retractable antenna.

Abstract: A compact multiband Inverted-F antenna (110) that has a compact form factor and is particularly suited for manufacturability and inclusion into small form-factor devices. The Inverted-F Antenna (110) includes a first arm (150) and a substantially parallel second arm (152) connected by a conductive bridge (206). An RF feed that has an RF contact (126) and a ground contact (124) is attached to a middle portion of the second arm (150). The Inverted-F antenna (110) is suitable for mounting on an external face of a non-conductive support (112). The RF feed (150, 152) extends through the non-conductive support to facilitate electrical connection to RF circuits (108). The Inverted-F Antenna (110) has a three band RF characteristic (300), with the upper two bands chosen to form a single, continuous RF band (304).

Abstract: A multiband element antenna (120) used in combination with a unique metal chassis design that enhances antenna performance and that enables the design of a compact and efficient antenna system. A cellular flip phone (100) that has a conductive chassis includes a flip up antenna (120) that pivots between an extended and a retracted position. The antenna (120) pivots at a point that is located on one edge of the top of the cell phone body (102). The conductive chassis of the flip cover (104) is grounded to the flip phone body (102) at a single point or single surface that is substantially opposite the antenna RF feed (122). Conductive surfaces of the cellular flip phone body (102) are grounded at a single point that is near the antenna RF feed point (122). This grounding arrangement has been found to control the flow of induced currents on the conductive portions of the flip cover (104) and body (102), thereby improving the performance of the device's antenna (120).

Abstract: A communication device (100, 500, 800) includes a housing (115) and an antenna system. The housing (115) comprises at least one metallic portion (110) and at least one non-metallic portion (105). The antenna system is for tuning the communication device (100, 500, 800) to radiate at one or more frequencies. The antenna system is located within the non-metallic portion (105) of the housing (115).

Abstract: A Parasitic Element (202) for use in combination with a Planer Inverted “F” Antenna (PIFA) (100) that creates an additional band of efficient operation for the combined antenna structure (200). The parasitic element (202) is able to be made to conform to surfaces (704) that are near the PIFA, such as of a case (704) of a cellular telephone (706). The parasitic element (202) is positioned so as to radiantly couple with the PIFA (100) in order to create the additional band of efficient operation. A parasitic element (202) is used with a dual band PIFA that operates in two RF bands, such as in the region near 800 MHz and 1.9 GHz, and adds a third band such as in the region near 1.575 GHz to support reception of Global Positioning System signals. This parasitic element (202) can conform to a case (704) of the cellular telephone (706).

Abstract: A multi-frequency internal antenna apparatus (10) for a clamshell type electronic device includes a flexible circuit (20) that electrically couples circuitry between the main housing (12) and flip housing (14). A conductive element (36) is disposed on the main housing (12) and tuned to be electrically resonant above the operating frequencies of the electronic device. The conductive element (36) is disposed in proximity to the flip housing (14) in the open position and is electrically coupled at a high impedance point to the flexible circuit (20) and subsequently to the circuitry in the flip housing. When the movable flip housing is in the open position and being held by a user, the circuitry in the movable flip housing forms a secondary conductive element providing dipole characteristics that tunes the combined conductive elements to the operating frequencies of the electronic device.

Abstract: A multi-frequency internal antenna apparatus (10) for a clamshell type electronic device includes a flexible circuit (20) that electrically couples circuitry between the main housing (12) and flip housing (14). A conductive element (36) is disposed on the main housing (12) and tuned to be electrically resonant above the operating frequencies of the electronic device. The conductive element (36) is disposed in proximity to the flip housing (14) in the open position and is electrically coupled at a high impedance point to the flexible circuit (20) and subsequently to the circuitry in the flip housing. When the movable flip housing is in the open position and being held by a user, the circuitry in the movable flip housing forms a secondary conductive element providing dipole characteristics that tunes the combined conductive elements to the operating frequencies of the electronic device.

Abstract: A communication device 10 and a corresponding method are arranged for changing the radiation pattern of an antenna 14, where the radiation pattern of the antenna 14 is set to a half-space pattern if the communication device 10 is in close proximity to an object. A reflector 18 is activated to produce the half space radiation pattern. The reflector 18 is deactivated to produce the full space pattern. A switching device 26 determines the state of the reflector 18. A sensing and control device 23 controls the state of the switching device 26.

Abstract: A hand held communication device (10) employs a first flip portion (14) that is pivotal with respect to a base portion (12), wherein the first flip portion (14) includes an antenna (20) and at least a power amplifier circuit (200) operatively coupled to an antenna (20). A second flip portion (16), also pivotal with respect to the base portion (12), includes at least one of a display (24) and a microphone (22). The first flip portion (14) preferably fits within a recessed area (46) of the second flip portion (16) and deploys automatically when the hand held device is opened.

Abstract: A antenna apparatus for an electronic device having a clam-shell movable housing includes an antenna element that serves as the mechanical spring for a hinge assembly of the clam-shell housing as well as an antenna element resonant at an operating frequency of the electronic device. The antenna element is electrically coupling to a receiver of the electronic device and is also mechanically pre-loaded to the hinge assembly to mechanically rotate a movable portion of the clamshell housing away from a main housing portion.

Abstract: A antenna apparatus for an electronic device having a clam-shell movable housing includes an antenna element that serves as the mechanical spring for a hinge assembly of the clam-shell housing as well as an antenna element resonant at an operating frequency of the electronic device. The antenna element is electrically coupling to a receiver of the electronic device and is also mechanically pre-loaded to the hinge assembly to mechanically rotate a movable portion of the clamshell housing away from a main housing portion.

Abstract: A low power switched diversity antenna system (200) includes two varactor tuned antennas (205, 207), each including an antenna element (505) and a varactor (515). The varactor tuned antennas intercept components of electromagnetic radiation that are substantially orthogonally polarized. One of the varactor tuned antennas is tuned to a desired frequency and the other is detuned, achieving a relative gain of the tuned varactor tuned antenna to the detuned varactor tuned antenna of at least 3 dB at the desired frequency.