Ericsson Gmbh

Telefonaktiebolaget Lm Ericsson (publ)

Sony Ericsson Mobile Communications Ab

Macom Technology Solutions Holdings, Inc.

Robert A Sadler

Gerard James Hayes

Huan-sheng Hwang

Howard Eugene Holshouser

John Michael Spall

Mohammod Ali

David Runton

Scott Ladell Vance

John Thomas Sadler

John Weldon Gammon

Mark Gordon Douglas

William Paul Stewart

A multicomponent network may be added to a transmission line in a high-frequency circuit to transform a first impedance of a downstream circuit element to second impedance that better matches the impedance of an upstream circuit element. The multicomponent network may be added at a distance more than one-quarter wavelength from the downstream circuit element, and can tighten a frequency response of the impedance-transforming circuit to maintain low Q values and low VSWR values over a broad range of frequencies.

Ultra-broad bandwidth matching technique

An antenna for a radio communications device includes a ground plane and a conductor loop overlying the ground plane. A monopole extends off the ground plane, and the monopole and the conductor loop are coupled at a common feedpoint. In some embodiments, the conductor loop is rectangular. In further embodiments, the antenna may further include a helical element arranged coaxial with the monopole and coupled to the common feedpoint. The ground plane, the conductor loop, the monopole and the helical element may be configured to provide a desirable voltage standing wave ratio (VSWR) over a wide frequency range of frequencies used for cellular telephony, global positioning services, and ad hoc wireless networking. Radio communications devices incorporating such antennas are also described.

Multi-band antennas and radio apparatus incorporating the same

A communications device includes a cover member, a circuit board having a lowest point of potential, and an antenna to transmit and receive RF signals. The antenna is electrically connected to the circuit board. A carrier is interposed between the circuit board and the cover member. The carrier includes an electrically conductive layer electrically connected to the point of lowest potential of the circuit board.

Electrically conductive carrier and patterning for controlling current distribution in a wireless communications device

Multi-band, Inverted-F Antenna with capacitively created resonance, and radio terminal using same. The present invention creates an additional resonance frequency in a planar-style, inverted-F antenna (PIFA), such as that typically used in mobile radiotelephone or other types of radio terminals. A first radiating branch of the antenna is connected to the signal feed conductor and the ground feed conductor. A second radiating branch is connected to the signal feed conductor and the ground feed conductor at one end and is capacitively coupled to the first radiating branch at the other end so that the antenna resonates at an additional resonance frequency. The additional resonance frequency can be used for, among other things, adding GPS or Bluetooth functionality to a radiotelephone terminal that otherwise operates on GSM (Global System for Mobile) or other mobile radiotelephone terminal frequencies.

Multi-band, inverted-F antenna with capacitively created resonance, and radio terminal using same

A conductive element with a primary branch and a secondary branch are separated by a bend segment and the signal and ground feeds are positioned adjacent each other on a common portion of the conductive element. The frequencies in the high band may be at least about twice that of the frequencies in the low band. The branches and bend segment are constructed such that the primary branch radiates at both high and low band operation. The two branches combine to form a more efficient high band radiator.

Multi-branch planar antennas having multiple resonant frequency bands and wireless terminals incorporating the same

Compact, planar inverted-F antennas are provided that radiate within multiple frequency bands for use within communications devices, such as radiotelephones. Multiple signal feeds extend from a conductive element in respective spaced-apart locations. A respective plurality of micro-electromechanical systems (MEMS) switches are electrically connected to the signal feeds and are configured to selectively connect the respective signal feeds to ground or RF circuitry. In addition, each MEMS switch can be opened to electrically isolate a respective signal feed.

Multiple frequency inverted-F antennas having multiple switchable feed points and wireless communicators incorporating the same

Multi-frequency band antennas for use within wireless communicators, such as radiotelephones, are provided and include a first conductive branch configured to radiate in a first frequency band and a second conductive branch configured to radiate in a second frequency band that is different from the first frequency band. The first conductive branch includes opposite first and second end portions and opposite first and second edge portions that extend between the first and second end portions. A notch is formed in the second edge portion adjacent the second end portion. The second conductive branch includes opposite third and fourth end portions and opposite third and fourth edge portions that extend between the third and fourth end portions. The first and second conductive branches are connected together at the first and third end portions and are configured to electrically couple at the respective second and fourth end portions. Coupling is utilized between the first and second conductive branches to achieve bandwidth and gain results desired for the antenna.

Multi-frequency band inverted-F antennas with coupled branches and wireless communicators incorporating same

Multiple frequency band antennas having first and second conductive branches are provided for use within wireless communications devices, such as radiotelephones. First and second conductive branches are in adjacent, spaced-apart relationship. First and second signal feeds extend from the first conductive branch and terminate at respective first and second switches. Third and fourth signal feeds extend from the second conductive branch and terminate at respective third and fourth switches. The first and second conductive branches can jointly radiate as a dipole antenna in a first frequency band when the first and fourth switches are open, and when the second and third switches electrically connect the second and third feeds to a first receiver/transmitter. Antenna structure may be changed by reconfiguring the various switches. For example, the first and second conductive branches may radiate separately as respective inverted-F antennas, or may radiate independently as monopole antennas.

Convertible dipole/inverted-F antennas and wireless communicators incorporating the same

An internal dipole bowtie/meander antenna for a mobile terminal is capable of operating in two distinct RF bands. The antenna includes a resonating element and a ground element positioned on opposite sides of a dielectric material. The dielectric material is positioned generally perpendicular to a ground plane of the antenna. Tuning elements may be added to vary the coupling of the antenna elements to the ground plane.

Dual band bowtie/meander antenna

Antenna systems for use with wireless communicators, such as radiotelephones, are provided and include a first antenna configured to be internally mounted within a wireless communicator and a retractable, second antenna that couples with the first antenna when extended. The internal, first antenna is resonant within one or more frequency bands and the retractable, second antenna couples with the internal, first antenna so as to enhance one or more of the resonant frequency bands of the internal, first antenna.

Antenna systems including internal planar inverted-F antennas coupled with retractable antennas and wireless communicators incorporating same

Planar inverted-F antennas having planar, non-linear conductive elements for use within communications devices, such as radiotelephones, are provided. Each planar, non-linear conductive element includes a first elongated segment and a second elongated segment in adjacent, co-planar, spaced-apart relationship with each other. A U-shaped intermediate segment electrically connects the first and second elongated segments. A signal feed extends outwardly from the first segment and is configured to electrically connect with RF circuitry within a communications device. A ground feed also extends outwardly from the first segment adjacent the signal feed and is configured to electrically ground the non-linear conductive element to a ground plane.

Inverted-F antennas having non-linear conductive elements and wireless communicators incorporating the same

Inverted-F antennas having elongated, conductive elements for use within communications devices, such as radiotelephones, are provided. An elongated, meandering conductive element having a plurality of spaced-apart U-shaped undulations is maintained in adjacent, spaced-apart relationship with a first ground plane. One or more of the U-shaped undulations capacitively couple to the ground plane and allow the antenna to resonate at lower frequencies and with a greater bandwidth. A second ground plane may be oriented in a direction transverse to the first ground plane so as to be positioned in adjacent, spaced-apart relationship with one or more of the U-shaped undulations. One or more of the U-shaped undulations can capacitively couple to the second ground plane, as well as to the first ground plane. In addition, one or more inductive elements may be electrically connected to an elongated conductive element.

Compact, broadband inverted-F antennas with conductive elements and wireless communicators incorporating same

Multiple frequency band antennas having first and second conductive branches are provided for use within wireless communications devices, such as radiotelephones. A first conductive branch has first and second feeds extending therefrom that terminate at respective first and second micro-electromechanical systems (MEMS) switches. A second conductive branch is in adjacent, spaced-apart relationship with the first conductive branch. One end of the second conductive branch terminates at a third MEMS switch and the opposite end of the second conductive branch is connected to the first conductive branch via a fourth MEMS switch. The fourth MEMS switch is configured to be selectively closed to electrically connect the first and second conductive branches such that the antenna radiates as a loop antenna in a first frequency band. The fourth switch is also configured to open to electrically isolate the first and second conductive branches such that the antenna radiates as an inverted-F antenna in a second frequency band different from the first frequency band.

Convertible loop/inverted-f antennas and wireless communicators incorporating the same

An internal, loop dipole antenna for a mobile terminal is capable of operating in two distinct RF bands. The antenna includes a resonating element and a parasitic tuning element. The resonating element has a looped, dipole configuration including a primary tuning loop, a secondary tuning loop, and a ground loop. The parasitic tuning element is disposed in a plane spaced from the plane of the resonating element. The parasitic element includes a first portion that generally follows the ground loop on the resonating element, and a second portion that bisects the primary tuning loop on the resonating element. First and second tuning arms extend along opposing ends of the parasitic tuning element. The length of the tuning arms is adjusted to tune the resonance of the antenna in the primary and secondary operating bands.

Growing community of inventors

Raleigh, NC, United States of America

Robert A Sadler