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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 8103221 | High-isolation transmit/receive switch on CMOS for millimeter-wave applications A CMOS monolithic transmit/receive switch comprises a single pole double throw switch (SPDT) module operable to selectively connect an antenna port to either a transmit port or to a receive port. A transmit matching network comprising a first transmission line match... | 01/24/2012 |
| 8055210 | Transceiver for radio-frequency communication A transceiver for radio-frequency communication comprises a waveguide, a transmitting port, a receiving port and a receiver load termination. The waveguide receives and transmits radio-frequency signals. The transmitting port is connected to the waveguide and transm... | 11/08/2011 |
| 7949310 | RF filtering at very high frequencies for substrate communications A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric... | 05/24/2011 |
| 7680464 | Waveguide—printed wiring board (PWB) interconnection An RF interconnection between RF Printed Wiring Boards (PWBs) includes a waveguide transmission line coupled between the RF PWBs. The waveguide feeds are provided as integral parts of each PWB. In one embodiment, the waveguide interconnecting the PWBs is provided as... | 03/16/2010 |
| 7680463 | Method and arrangement for testing a radio device A method and an arrangement for testing a radio device without radiation losses are provided. The arrangement comprises a waveguide closed at both its ends and comprising a holder arranged to hold the radio device at least partly inside the waveguide in such a manne... | 03/16/2010 |
| 7650121 | Time division duplexing transmission/reception apparatus and method using polarized duplexer A time division duplexing (TDD) transmission/reception apparatus and method are provided. The TDD transmission/reception apparatus includes: a transmitter which generates a transmitted signal; an antenna which transmits the transmitted signal to an external device a... | 01/19/2010 |
| 7542730 | Method and system for filtering wavetable information for wireless devices A method for providing wavetable information to a wireless device from a content server over a wireless network, the wavetable information including a plurality of samples corresponding to a plurality of notes, comprising: in response to a request from the wireless ... | 06/02/2009 |
| 7362273 | Dual-polarized feed antenna apparatus and method of use An antenna apparatus and method for the interception of randomly polarized electromagnetic waves utilizing a dual polarized antenna which is excited through a cross-slot aperture using two well-isolated orthogonal feeds. ... | 04/22/2008 |
| 7359677 | Device and methods for high isolation and interference suppression switch-filter Systems and methods are provided for a stacked die configuration of a high isolation switch and a rejection filter where transmit and receive signals are desired to have a high out-of-band rejection and a low loss band-pass region. In some aspects of the invention t... | 04/15/2008 |
| 7348864 | Integrated MMIC modules for millimeter and submillimeter wave system applications An integrated circuit module comprising integrated coupling transmission structures protruding from the main body of the integrated circuit with extra substrate material removed around and/or under the coupling transmission structures. ... | 03/25/2008 |
| 7330703 | Transceiver for bidirectional frequency division multiplexed transmission The present invention relates to a transceiver for bidirectional frequency division multiplexed transmission, a communication system including one or more transceivers. Optionally, the communication system is a communication system for a digital subscriber line. The... | 02/12/2008 |
| 7227495 | Radar fill-level sensing device A radar fill-level sensing device has a high-frequency unit that serves to generate and process radar signals of a predefined frequency and wavelength, an antenna for transmitting and/or receiving the radar signals, as well as circuitry, provided on a circuit board.... | 06/05/2007 |
| 7197222 | Waveguide interface Apparatus and associated systems for transmission of signals within a wide bandwidth (e.g., from DC to 40 GHz and above) include a conduction path and ground structures in an arrangement to provide a smooth transition between propagation in a coplanar wavegui... | 03/27/2007 |
| 7142074 | Multilayer waveguide filter employing via metals A waveguide filter is disclosed. The waveguide filter includes a lower conductive layer; a plurality of dielectric layers stacked on the lower conductive layer; an upper conductive layer formed on a top surface of the plurality of dielectric layers; a waveguide form... | 11/28/2006 |
| 7130590 | Transceiver assembly A transceiver assembly including an antenna input/output transition, a transmit module, a receive module, and a diplexer. The diplexer has opposing planar surfaces and the transmit module, receive module and antenna input/output transition are placed on the same pla... | 10/31/2006 |
| 7123883 | Systems and methods that employ a balanced duplexer The present invention relates to systems and methods that employ a novel balanced duplexer that can be utilized to facilitate concurrent signal transmission and reception. The systems and methods can be employed within mobile devices such as cell phones and utilize ... | 10/17/2006 |
| 7123884 | RF switch A radio frequency (RF) switch which is used in an RF unit of a communication apparatus and which has less of an insertion loss during a transmission. A strip line disposed in the RF switch is formed by combining first and second strip lines having different values o... | 10/17/2006 |
| 7109917 | Intergrated semiconductor component for high-frequency measurement and use thereof It is provided that the semiconductor component is a component of a semiconductor circuit (10) comprising a first silicon layer (12), an adjoining silicon dioxide layer (insulating layer (14)) and a subsequent further silicon layer (structured l... | 09/19/2006 |
| 7109922 | Rf system concept for vehicular radar having several beams ABSTRACTA transceiver (20) for a millimeter wave signal, consisting of a PCB (140) having PCB microstrip lines (141) and PCB waveguide apertures (159), and one or more transmitter modules (22) and one or more receiver modules (2... | 09/19/2006 |
| 7107015 | ISM band to U-NII band frequency transverter and method of frequency transversion A frequency transverter (10) and method for enabling bi-frequency dual-directional transfer of digitally encoded data on an RF carrier by translating between a crowded or otherwise undesirable first frequency band, such as the 2.4 GHz ISM band, and a less-cro... | 09/12/2006 |
| 7099692 | Infrared transceiver module for a wider working range An infrared transceiver module for enabling a multiple direction infrared communication includes a transfer element for enlarging the working angles of infrared emission and reception of a transmitter and receiver portion. The transfer element has a surface area lar... | 08/29/2006 |
| 7091798 | Notch filter system and method A circulator is used as a notch filter having a notch at a notch frequency band outside its frequency band of operation as a circulator. It has been observed that circulators operate as a notch filter at a relatively narrow band of operation outside its typical band... | 08/15/2006 |
| 7068118 | Pulse modulator for nonradiative dielectric waveguide, and millimeter wave transmitter/receiver using the same A pulse modulator includes a circulator which comprises: two ferrite plates; a plurality of mode suppressors for transmitting therethrough an LSM mode electromagnetic wave while shutting off an LSE mode electromagnetic wave; and an impedance matching member mounted ... | 06/27/2006 |
| 7057472 | Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using them A multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands, a first and a second switch circuit for switching a high frequency signal and a low frequency signal demultiplexed by the... | 06/06/2006 |
| 7024165 | ISM band to U-NII band frequency transverter and method of frequency transversion A frequency transverter (10) and method for enabling bi-frequency dual-directional transfer of digitally encoded data on an RF carrier by translating between a crowded or otherwise undesirable first frequency band, such as the 2.4 GHz ISM band, and a less-cro... | 04/04/2006 |
| 7013121 | Frequency conversion circuit using common local synthesizer A radio for use in microwave datalink applications in which a common local oscillator is used for both a final radio frequency (RF) up-converter stage and an initial RF down converter stage. The frequency of the common local oscillator corresponds to an integer mult... | 03/14/2006 |
| 6985760 | Foldable portable radio terminal A foldable portable radio terminal is disclosed which normally optimizes an antenna characteristic by an antenna matching circuit even if the body length of the foldable portable radio terminal varies. A folded state detection circuit sends a detection signal to a c... | 01/10/2006 |
| 6980776 | Transceiver apparatus The present invention provides a transceiver apparatus that permits miniaturization even when the antenna thereof is an unbalanced circuit and the transmitter circuit section and receiver circuit section thereof are balanced circuits. The transceiver apparatu... | 12/27/2005 |
| 6961544 | Structure of a radio-frequency front end The invention relates to an integrated structure of a radio-frequency front end of a communications apparatus. The antenna of the communications apparatus is constructed on a printed circuit board. To this antenna board (310), on its ground plane side, a seco... | 11/01/2005 |
| 6950634 | Transceiver circuit arrangement and method A doubly balanced transceiver system having a transmit terminal (TX), a receive terminal (RX), and an an antenna terminal (ANTENNA), 180° hybrids (201, 240), 90° hybrids (204, 304, 235 and 335), a power amplifier (230, 330) and a RX/TX ... | 09/27/2005 |
| 6934562 | System for coupling a mobile radio service base station to an antenna Coupling one or more receivers and transmitters of a base station to an antenna in a cellular-like commercial mobile radio services (CMRS) system. The antenna is coupled to a receive path and to a transmit path via a circular. Each receive path comprise one or more ... | 08/23/2005 |
| 6917343 | Broadband antennas over electronically reconfigurable artificial magnetic conductor surfaces A low profile antenna system includes an artificial magnetic conductor comprising a frequency selective surface (FSS) having an effective sheet capacitance which is electronically variable to control resonant frequency of the AMC and the resonant frequency of an ant... | 07/12/2005 |
| 6868258 | Structure for connecting non-radiative dielectric waveguide and metal waveguide, millimeter wave transmitting/receiving module and millimeter wave transmitter/receiver It is an object of the invention to provide a connection structure for connecting the dielectric strip of an NRD guide with a metal waveguide, in which the conversion loss (connection loss) for high-frequency signals is reduced, and in which the NRD guide as well as... | 03/15/2005 |
| 6832081 | Nonradiative dielectric waveguide and a millimeter-wave transmitting/receiving apparatus A NRD guide includes a pair of parallel plate conductors opposed to each other at a spacing equal to or shorter than half the wavelength of a high-frequency signal to be transmitted and having opposing inner surfaces whose arithmetic average roughness Ra satisfies 0... | 12/14/2004 |
| 6788918 | Transmission line assembly, integrated circuit, and transmitter-receiver apparatus comprising a dielectric waveguide protuding for a dielectric plate In a transmission line assembly, a dielectric plate has a continuous protruding portion on at least one of the surfaces thereof so as to form a convex section, electrodes are formed on both of the surfaces of the dielectric plate including the outer surface of the p... | 09/07/2004 |
| 6728515 | Tuned wave phased array A tuned wave phased array includes a plurality of spaced transmitter elements, a signal generator that produces an activation signal for activating the transmitter elements to transmit a guided wave in an associated medium and a delay circuit for sequentially delayi... | 04/27/2004 |
| 6658233 | Satellite broadcast receiving converter A satellite broadcast receiving converter has a housing, a waveguide, and a short-circuit wall, which are stamped out of a single metal sheet and are then folded.... | 12/02/2003 |
| 6640084 | Complete outdoor radio unit for LMDS The complete outdoor radio unit for LMDS is a light weight, compact transceiver featuring planar circuitry. The transceiver uses cross polarization through an orthomodal transducer and frequency offset between transmit and receive to provide isolation bet... | 10/28/2003 |
| 6427066 | Apparatus and method for effecting communications among a plurality of remote stations An apparatus for communications by a home station among remote stations in at least one communication medium. The apparatus comprises (a) local signal receiving circuitry for receiving an originating signal containing local intelligence; and (b) local sig... | 07/30/2002 |
| 6374087 | Selective peak limiter with a circulator having a third branch having band-pass filter, a threshold element and an adapted load in series A peak limiter is intended to limit the peak of a signal that has a given frequency, in an assembly comprising other signals of lower amplitude and different frequencies. The peak limiter includes a circulator inserted into a line transporting all the sig... | 04/16/2002 |
