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| Number | Title | Issue Date |
| 8427386 | Method and circuit for transmitting and receiving radio waves with a single oscillatory circuit antenna Output terminals (o1, o2) of a differentially excited transmitting circuit (TC) are connected through matching capacitors (MC1, MC2) to connecting terminals of the oscillatory circuit antenna (OCA) on the other side said connection termin... | 04/23/2013 |
| 8072390 | Antenna arrangement An antenna arrangement comprises a first antenna element; a second antenna element; a coupling element for electromagnetically coupling to the first antenna element and the second antenna element; and a switching mechanism, connected to the coupling element, for swi... | 12/06/2011 |
| 7777688 | Polarization switching antenna device A polarization switching antenna device capable of switching a polarization without increase of an antenna installing space and also handling a variety of frequency bands is provided. A connection state of one end of a loop antenna element arranged on a side surface... | 08/17/2010 |
| 7400871 | Multi-antenna receiving and processing circuit assembly A multi-antenna receiving and processing circuit assembly is disclosed to include multiple antennas for receiving wireless signals, multiple pre-processing units respectively electrically connected to the antennas, a matching circuit electrically connected to the pr... | 07/15/2008 |
| 7162264 | Tunable parasitic resonators A mobile terminal can include a printed circuit board with a reference voltage conductor, an antenna coupled to the first side of the printed circuit board, and a parasitic resonator coupled to the second side of the printed circuit board. More particularly, the par... | 01/09/2007 |
| 7154442 | Built-in whip antenna for a portable radio device An antenna assembly for a portable radio device/mobile station is provided. The assembly includes a retractable whip antenna 24, a first radio lead 50 for coupling the whip antenna to a mobile telephony receiver, and a second radio lead 48 for c... | 12/26/2006 |
| 7013114 | Impedence-matched transmitting device having high interference immunity According to the present invention, the resistance to interference of a transmitting device, which is particularly embodied as a high frequency transmitter with a transmitter amplifier may be improved, whereby a loss-affected network, for example, in the form of a m... | 03/14/2006 |
| 6970140 | Antenna apparatus and portable apparatus using the same An antenna device comprises an antenna element formed in a sufficiently shorter length as compared with the wavelength of transmission or reception wave, a resistor, a matching circuit including at least a reactance element, and an output terminal connected to outsi... | 11/29/2005 |
| 6967631 | Multiple meander strip monopole antenna with broadband characteristic Disclosed is a multiple meander strip monopole antenna, which can have a broad bandwidth and easily miniaturize the antenna by using a meander structure. A grounding conductor plate is coupled to the under face of a dielectric base plate. A radial cross-strip is dis... | 11/22/2005 |
| 6950077 | Antenna system for terrestrial broadcasting Provided is an antenna system for terrestrial broadcasting. The antenna system has a dipole antenna probe receiving a broadcast signal, a signal amplifier amplifying the received broadcast signal, an antenna matching unit matching impedances between the antenna prob... | 09/27/2005 |
| 6903688 | Antenna device An antenna device is adapted for use in at least two frequency bands, wherein the mean wave length of the higher of said frequency bands is λ. The antenna device comprises an antenna element in the form of a reed (10) mounted on a conductive support structur... | 06/07/2005 |
| 6864849 | Method and apparatus for creating an EH antenna An antenna system for transmitting and receiving, in association with a radio device that develops an H-field and an E-field corresponding to a radio frequency power signal having a voltage and a current, the voltage having a phase relationship to the current. The a... | 03/08/2005 |
| 6727656 | Power splitter for plasma device The invention concerns a system including a microwave generator and a rectangular guide connected with the generator. The system is adapted to operate in fundamental (H10) or transverse electrical (TE10) mode, and associated with means providin... | 04/27/2004 |
| 6515557 | Isolating signal divider/combiner and method of combining signals of first and second frequencies A signal divider/combiner (11) and method combines first and second frequency signals received by microstrip patch antennas (58, 48). A first transmission line stub (28) blocks the second frequency signals on the first signal receiving path, and a second ... | 02/04/2003 |
| 6512489 | Antenna arrangement A antenna arrangement comprising a multiband antenna having at least one feed point; a multiplexer, the multiplexer comprising reciprocal networks and including at least one output coupled to the at least one feed point of the multiband antenna, the multi... | 01/28/2003 |
| 6509883 | Signal coupling methods and arrangements Signal coupling arrangements are described in which the effect of unwanted signals transferred between two antennas is compensated for. In one arrangement, a microstrip edge coupler is used as a compensation network to provide a cross-coupling path for th... | 01/21/2003 |
| 6489843 | Power amplifier and communication unit A power amplifier including: a first amplifier PA2 having an input terminal and an output terminal; a passive circuit PC3 having an input terminal and an output terminal; and a first switch SW2 having a single-pole terminal and two multi-throw terminals, ... | 12/03/2002 |
| 6147606 | Apparatus and method for radio frequency transponder with improved read distance A radio frequency identification transponder (RFID tag) in accordance with the principles of the present includes a tag antenna having a gain and an input impedance. The tag also includes RFID circuitry, which may be in the form of an RFID tag integrated ... | 11/14/2000 |
| 6104356 | Diversity antenna circuit The diversity antenna circuit comprises a first antenna for receiving a vertical plane of polarization of an electric wave, a second antenna for receiving a horizontal plane of polarization thereof, a receiving means for detecting the electric field stren... | 08/15/2000 |
| 5969683 | Radiotelephones with antenna matching switching system configurations 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 ... | 10/19/1999 |
| 5952735 | Method of and apparatus for optimizing the matching of pulse generators driving high "Q" tuned loads, by phase splitting A technique for optimizing the impedance match between a plurality of pulse generators and a high-Q tuned load by equally advancing and retarding the phase of equal groups of pulse generator modules with respect to the load voltage. The sum output current... | 09/14/1999 |
| 5771026 | Disguised broadband antenna system for vehicles A disguised broadband antenna system for use with a broadcast radio receiver and communications apparatus in a vehicle wherein the antenna system comprises a standard broadcast antenna mounted to the vehicle by means of a base, a distributed matching netw... | 06/23/1998 |
| 5402138 | Integrated MMDS/MDS antenna and dual band down converter A dual band MDS/MMDS down converter receiving system wherein the support boom of a semi-parabolic antenna contains the down converter electronics. Located at the focal area of the semi-parabolic antenna are a pair of driven feed elements which are connect... | 03/28/1995 |
| 5089829 | Antenna device shared by three kinds of waves An antenna device shared by three different waves has a single two-stage collinear antenna constituted by half-wave dipole antennas which are adapted for a vehicle telephone signal and are stacked one upon the other. The device allows an AM-FM radio recei... | 02/18/1992 |
| 4635070 | Dual mode antenna having simultaneous operating modes A dual mode broad band antenna especially designed to provide simultaneously high and low angle radiation patterns relative to a horizontal ground plane is disclosed herein. This particular antenna utilizes four wire radiators in the form of an inverted c... | 01/06/1987 |
| 4228544 | Antenna system using antenna base impedance transforming means An antenna system is disclosed for plural band radio receivers having a common antenna. The system is especially adapted for AM/FM automobile broadcast receivers and may be used with a CB transceiver with a tri-band antenna. An impedance transforming mean... | 10/14/1980 |
| 4095229 | Triband vehicle antenna An antenna for simultaneous connection to a citizen's band transceiver, an AM receiver and a FM receiver, particularly suitable for use on a vehicle such as an automobile. The antenna proper is a center-loaded upstanding rod which, in the preferred form, ... | 06/13/1978 |
| 4051475 | Radio receiver isolation system An isolation system adapted to permit simultaneous operation of at least colocated radio transceivers operating at different frequencies into at least one antenna by means of a single hybrid transformer having said at least one antenna coupled to one co... | 09/27/1977 |
| 3964070 | Corrugated horn having means for extracting divergence-measuring modes A horn of circular or rectangular cross-section has a multiplicity of circumferential grooves on its diverging inner peripheral wall; these grooves have a depth on the order of a quarter wavelength, at the upper end of the band of operating frequencies, a... | 06/15/1976 |
| 3942119 | Multiple-transmission-channel active antenna arrangement An antenna has two output terminals and is operative for receiving electromagnetic radiation and converting the same into electrical signals appearing across the two antenna output terminals. There are provided a first and a second transmission channel, e... | 03/02/1976 |
