Abstract: An antenna is provided with improved ruggedness and flexibility through the use of an embedded substrate with impedance matching circuitry disposed thereon, and a flexible electrical interconnect. The flexible electrical interconnect is coupled between the substrate and an antenna connector. The antenna comprises a first top flexible section having the flexible radiator element, a second stiff section comprising the impedance matching circuit for multi-band operation, and a third lower flexible section comprising the flexible electrical interconnect. Portable radio products incorporating the antenna can now provide multiband capability along with protection against drop.

Abstract: An antenna enables compact and robust multiband operation of portable radios. According to some embodiments, the antenna includes: a first rolled conductive strip having a first section with overlap between successive turns of the first conductive strip and a second section with no overlap between successive turns of the first conductive strip, the first section having an insulating layer between the overlapping successive turns of the first conductive strip; a second rolled conductive strip; and a flexible sheet to which both the first conductive strip and the second conductive strip are bonded.

Abstract: An antenna (100) with an embedded wideband matching substrate (102) is provided. The substrate (102) comprises impedance matching circuitry (300) providing a low frequency (LF) matching circuit (330) and a high frequency (HF) matching circuit (340) for tri-band operation. A stripline (314) having a stripline ground (324) is disposed on the substrate. The stripline (314) provides a matching element and the stripline ground (324) provides a common ground (324) for both the HF and LF matching circuits. The substrate (102) is shaped with a tabular portion (106) which facilitates encasing the substrate (102) within a casing (118). The tabular portion (106) further provides an alignment feature for wrapping of a flexible radiating element about the casing and flexible antenna rod (126) to complete the antenna structure (100).

Abstract: An antenna enables compact and robust multiband operation of portable radios. According to some embodiments, the antenna includes: a first rolled conductive strip having a first section with overlap between successive turns of the first conductive strip and a second section with no overlap between successive turns of the first conductive strip, the first section having an insulating layer between the overlapping successive turns of the first conductive strip; a second rolled conductive strip; and a flexible sheet to which both the first conductive strip and the second conductive strip are bonded.

Abstract: An antenna is provided with improved ruggedness and flexibility through the use of an embedded substrate with impedance matching circuitry disposed thereon, and a flexible electrical interconnect. The flexible electrical interconnect is coupled between the substrate and an antenna connector. The antenna comprises a first top flexible section having the flexible radiator element, a second stiff section comprising the impedance matching circuit for multi-band operation, and a third lower flexible section comprising the flexible electrical interconnect. Portable radio products incorporating the antenna can now provide multiband capability along with protection against drop.

Abstract: An antenna (100) with an embedded wideband matching substrate (102) is provided. The substrate (102) comprises impedance matching circuitry (300) providing a low frequency (LF) matching circuit (330) and a high frequency (HF) matching circuit (340) for tri-band operation. A stripline (314) having a stripline ground (324) is disposed on the substrate. The stripline (314) provides a matching element and the stripline ground (324) provides a common ground (324) for both the HF and LF matching circuits. The substrate (102) is shaped with a tabular portion (106) which facilitates encasing the substrate (102) within a casing (118). The tabular portion (106) further provides an alignment feature for wrapping of a flexible radiating element about the casing and flexible antenna rod (126) to complete the antenna structure (100).

Abstract: An antenna (100) having an antenna structure is provided. The antenna structure is formed of a rolled conductive strip having a first section (112) with overlap between successive turns and a second section (114) with no overlap between successive turns. The first section (112) has an insulating layer to prevent shorts between the successive overlapping turns. The antenna (100) provides multi-band capability.

Abstract: An antenna (100) having an antenna structure is provided. The antenna structure is formed of a rolled conductive strip having a first section (112) with overlap between successive turns and a second section (114) with no overlap between successive turns. The first section (112) has an insulating layer to prevent shorts between the successive overlapping turns. The antenna (100) provides multi-band capability.

Abstract: Methods and systems are described in which the feedback between a transmitter and collocated receiver is reduced so that the overall feedback loop gain is less than 0 dB. Audio is transmitted from the transmitter to the receiver through a primary RF link while RSSI or TOA information to determine the separation between the end devices is exchanged using an ancillary RF link. The total loop gain is calculated using the gain of each end device and the separation. If the distance is less than a threshold distance, the gain of one or more components in the transmitter and/or receiver is reduced.

Abstract: Methods and systems are described in which the feedback between a transmitter and collocated receiver is reduced so that the overall feedback loop gain is less than 0 dB. Audio is transmitted from the transmitter to the receiver through a primary RF link while RSSI or TOA information to determine the separation between the end devices is exchanged using an ancillary RF link. The total loop gain is calculated using the gain of each end device and the separation. If the distance is less than a threshold distance, the gain of one or more components in the transmitter and/or receiver is reduced.

Abstract: A mobile communication device (202) outside the service area of a communications network 210 in need of satellite positioning assistance information to perform a location determination (308). The mobile communication device receives the assistance information from a peer mobile communication device (204, 206) over a direct link.

Abstract: An antenna provides dual band capability by providing a single feed (102) leading into a helix (104), the helix characterized by a pitch (106) and number of turns (120) varied to provide dual band operation to a portable communication device.