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6469672 |
Method and system for time domain antenna holography
A fast, novel method is disclosed which permits to determine the electrical features of an antenna. The antenna is excited with an ultra-short voltage pulse and the far field radiation pattern of...
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6469673 |
Antenna circuit arrangement and testing method
The invention concerns generally the technological field of planar antenna arrangements in portable radio devices. Especially but not exclusively the invention concerns inverted-F antenna...
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6448787 |
Apparatus and method for measuring and tuning circularly polarized antennas
An apparatus and method is disclosed for measuring and tuning circularly polarized antennas to simultaneously optimize axial ratio, resonant frequency, and impedance match. The antenna under test...
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6442371 |
Polarization measuring apparatus in a mobile communication system
A polarization measuring apparatus in a mobile radio communication system which can accurately measure a polarized wave of a code division multiple access (CDMA) signal. The apparatus can measure...
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6437577 |
Circuit to test the working of at least one antenna
A circuit to test the working of antennas for a radio telephone. The antennas each have a radiator with one end that open rises up into the space. The test currents flow through antenna wires to...
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6437748 |
Tapered anechoic chamber
The present invention includes tapered anechoic chambers and chamber systems. This invention also includes machines or electronic apparatus using these aspects of the invention. The present...
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6424305 |
Apparatus and method for determining return loss of an electrical device
A testing apparatus that comprises an electrical device. A first circuit is in electrical communication with the electrical device. The first circuit including an amplifier. First and second...
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6421004 |
Mitigation of antenna test range impairments caused by presence of undesirable emitters
An antenna test range uses direct spread-spectrum based test signals to test the performance of an antenna. Since a spread spectrum waveform has high autocorrelation properties with itself and high...
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6407540 |
Switched attenuator diode microwave power sensor
The present invention relates to a switched attenuator diode microwave power sensor and more particularly to a true average, wide dynamic range microwave power sensor utilizing a switched step...
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6384789 |
Apparatus for testing mobile telephones
A testing apparatus for testing mobile telephones includes an antenna coupler, a holder and a testing device. The antenna coupler includes a printed circuit board upon one side of which is formed a...
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6380748 |
Apparatus and method for diagnosing antennas using switches
An apparatus and method for diagnosing antennas using switches, wherein a system is configured in such a manner that a plurality of switches determine a data flow of a signal for test. Therefore,...
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6366249 |
Radio frequency antenna
A vehicle antenna comprising: an antenna structure having an input impedance, Z A , equal to a sum of a resistance and an active impedance; a circuit element having high circuit element impedance...
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6353418 |
Horn antenna having a dielectric insert with a wide-based cone section
An antenna for transmitting microwaves is provided, which radiates microwaves to be transmitted as far as possible uncorrupted into free space and operates in a low-loss manner, having a circular...
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6335705 |
Automotive radar antenna alignment system
Two receive antennas integrated with power detectors are used to align the thrust vector of a vehicle to the boresite of an automotive radar antenna mounted upon the vehicle. In the system, a...
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6329952 |
Automobile radar antenna alignment system using transponder and lasers
A transponder (200) is attached to a laser alignment fixture (210) and used to align an automobile collision avoidance radar antenna boresite with the thrust vector of the vehicle. The alignment...
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6329953 |
Method and system for rating antenna performance
A system and method for rating the performance of competing antennas under various environmental conditions is herein disclosed. The present invention provides a method to statistically...
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6326929 |
Method and device for the measurement of antenna impedance
The device comprises a current/voltage transformer (1) coupled by its primary winding between a matching device (2) of an antenna (3) and the output of an amplifier (4) for the supply or the...
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6313799 |
Diagnostic device for a multi-antenna arrangement
A diagnostic device having a diversity processor for individually testing the electrical condition of the connections of individual antennas of a multi-antenna system in a motor vehicle. This...
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6314272 |
Radio frequency broadcast system for enclosed spaces
Uniform and concentrated radio broadcast signals are obtained employing an antenna structure which uses separate antenna conductors on opposite sides of a radio reception area. The antenna...
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6310579 |
Method and apparatus for calibrating antenna apparatus and testing an antenna connected thereto
A method and apparatus for calibrating an antenna apparatus and testing an antenna connected thereto is provided. The calibration is conducted without an antenna connected to establish a baseline...
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6304229 |
Electromagnetic wave detecting device incorporating therein a thermocouple
An electromagnetic wave detecting device includes a dipole antenna having a pair of disjointed arms for receiving an electromagnetic wave and a thermocouple having a first and a second leg of two...
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6297780 |
Mobile apparatus with plurality of antennas having different directivities
In a mobile apparatus for communication with a satellite, a plurality of antennas having different directivities from each other are provided. A selector circuit is connected between a transmitter...
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6295032 |
Broadband horn antennas and electromagnetic field test facility
Electromagnetic radiating structures suitable for use as antennas or in electromagnetic field test facilities. An electromagnetic field test facility is a test enclosure used for observing the...
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6289216 |
Method and system for measuring standing wave ratio in a mobile communications system
A method for measuring a voltage standing wave ratio (VSWR) without another test device for testing a radio unit of a base station in a mobile communications system is disclosed. The method for...
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6289290 |
Method for estimating radiated emission level from an EUT at an arbitrary position on the turn table at OATS
A method for evaluating radiation electric fields using output port powers of GTEM cell to obtain correlation between GTEM cell and Open Area Test Site(hereinafter, called OATS) in order to...
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6288683 |
Antenna mirror surface measuring/adjusting device
An antenna mirror surface measuring/adjusting apparatus has a plane mirror larger than an aperture surface of said principal reflection mirror and set in parallel with the aperture surface, an...
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6285330 |
Antenna field tester
An apparatus and method for testing of rotating surface based antennas arrays (regardless of their shape), with the capability of fully diagnosing and locating a failure on the face of the antenna...
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6266022 |
Device for determining the filling level of a filling material in a container
The invention relates to a device (1) for determining the filling level in a container (4). Moreover, the invention also relates to a method for fastening an input coupling unit (9) on the antenna...
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6262686 |
Antenna intended for a radio communication transceiver
An antenna for installation in a radio communication device, namely a transmitter and/or receiver, has a substantially cylindrical exterior surface and includes at one end a light source which is a...
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6255830 |
Method of testing shielding effectiveness and electromagnetic field generator for use in testing shielding effectiveness
An electromagnetic field generator is provided which consists of a regulated self contained voltage supply connected to a high frequency clock which drives one or more printed circuit board...
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6249254 |
Flat panel antenna
A small size, flat panel, 1/6 th wavelength antenna is provided. A flat copper-clad dielectric substrate is processed on a first flat side to produce a copper triangular or pseudo...
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6249248 |
Radio wave visualizing method and apparatus
An object shape distribution of an antenna intergral-type communication device to be observed with a sensor for measuring a three-dimensional shape is measured and recorded, and a scanning...
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6243042 |
Optoelectronic system for the testing of an antenna
This optoelectronic system for the testing of a main antenna comprises: a test antenna designed to be placed in the field of transmission or reception of the main antenna; an optoelectronic...
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6236371 |
System and method for testing antenna frequency response
A system and method tests the frequency response of a linear time-invariant unit-under-test, such as an antenna. A test signal is generated at a selected frequency and modulated with a spread...
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6229490 |
Antenna coupler for testing mobile telephones
In an antenna coupler (100) for testing mobile telephones (10), simple structure, which has a low coupling attenuation, is provided in that the antenna coupler (100) has the following features: a...
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6215448 |
Broadband coupler for measurement of antenna signals
A selected length of antenna for a device under test is placed within a conductive inner cylinder, forming an unterminated "input" coaxial transmission line. The inner cylinder is in turn within...
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6191744 |
Probe movement system for spherical near-field antenna testing
A probe movement apparatus for spherical near-field antenna testing moves a probe (22) over a spherical measurement surface or path by two bent cantilevered arms (14 and 18). A positioner (12 or...
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6188365 |
Testing device and method
A device for testing a transmitter and/or receiver of electromagnetic waves includes a hollow metal body, dimensioned to function as a waveguide, including a hole for receiving a test antenna and a...
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6181285 |
Low-distortion positioning equipment for antenna radiation pattern measurements
An antenna positioner is provided for use in an anechoic chamber to enable the radiation pattern of an antenna under test to be measured. A vertically disposed and selectively rotatable azimuth...
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6160517 |
Method and apparatus for testing electronic systems using electromagnetic emissions profiles
A printed circuit board assembly testing device includes a LISN device connected to a power source and to a test enclosure. The test enclosure includes a power supply and a communication port. A...
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6144341 |
Electromagnetic emission location and measurement apparatus and method
An apparatus for detecting, locating and measuring electromagnetic radiation is provided. The apparatus may be a self-contained, portable device which permits a user to detect, locate and measure...
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6144345 |
Variable attenuator for satellite signals
For use in or with a satellite receiving system having a receiving element such as low noise amplifier, a selectively variable RF signal attenuator locatable between the satellite and the amplifier...
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6144692 |
System and method of testing for passive intermodulation in antennas
A system and method of testing for passive intermodulation in antennas includes circuitry for generating at least two distinct frequencies. A pulse phase modulator modulates each frequency with a...
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6127980 |
Dual polarization electromagnetic field simulator
An electromagnetic simulator for testing the behavior of equipment in the presence of strong electromagnetic fields includes radiating horns at opposite sides of the test area. Conical or...
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6118409 |
Method and device for inspecting at least one antenna branch, in particular in a vehicle
In order to inspect at least one antenna branch (A1, A2, . . . An), in particular in a vehicle, a power level to be radiated is initially fed into the antenna branch, after which a power level...
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6104351 |
Battery operated satellite antenna heating system
A heated antenna system includes an antenna having a reflecting surface and a heater associated with the reflecting surface. A base is connected with the antenna. A direct current voltage supply is...
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6100851 |
Satellite antenna heating system
A heated antenna system includes an antenna having a reflecting surface and a heater associated with the reflecting surface. The heater has a current and at least one voltage. An electrical control...
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6087995 |
Universal autoradar antenna alignment system
An automobile collision avoidance radar antenna alignment system includes a first interferometer (506) with antennas (501) and (503) for alignment along an azimuth (x) axis of the collision...
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6084551 |
Electromagnetic probe for the detection of e-field and h-field radiation
An electromagnetic probe for the detection of both E-field and H-field radiation includes a quasi-isotropic E-field antenna and a quasi-isotropic H-field antenna. The quasi-isotropic E-field...
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6047019 |
Receiver for spectrum spread communication system
A receiver for a spectrum spread communication system capable of eliminating a deterioration in receive quality due to fading by multipass. A signal of which a spectrum is spread by a direct spread...
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