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JP3341897B2 |
An antenna assembly has a first helical antenna and a second rod antenna extending through inside said first antenna in the axis direction. When the antenna is retracted, the upper end of a conductive portion of the second antenna passes...
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JP2002314312A |
To provide a combination antenna in which both antenna are less likely connected even though a monopole antenna is decentered a little when an antenna for a satellite and a ground antenna comprise a helical antenna and the monopole anten...
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JP3337535B2 |
A non-contact rotating coupler for transmitting a signal through coupling capacitances (C2, C3) formed between opposite coupling plates (10, 20) arranged apart from each other. In the coupling plates (10, 20), an inductance (L1, L2) for ...
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JP3334134B2 |
It is an object of the present invention to receive simultaneously signals with different polarizations with the aid of helical feeders without gain degradation compared to known systems. According to the invention two or more helical fe...
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JP3332023B2 |
There are provided a mobile satellite communication terminal and a method of using the same in which the dual-mode communication can be conducted by one terminal, and the antennas of both modes are housed and arranged on one axis in a co...
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JP3328159B2 |
To provide an antenna structure for a portable radio equipment, which can obtain satisfactory radiation efficiency at the time of extending and storing it, and can obtain a satisfactory characteristic as an antenna. A whip antenna 21 whi...
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JP3328306B2 |
PURPOSE: To widen a band without changing the size of a truncated conical body by selecting the gradient angle of a tangent line of a conical spiral curve to be small around the center of the conical spiral curve and to be larger gradual...
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JP2002267733A |
To precisely specify a radio wave transmission source position of a short wave band.In this method, a wave angle and an azimuth of a received radio wave are calculated by a data processing controlling part 44 based on data of a horizonta...
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JP2002530982A |
Disclosed is a broadband, miniaturized, slow-wave antenna for transmitting and receiving radio frequency (RF) signals. The slow-wave antenna comprises a dielectric substrate with a traveling wave structure mounted on one surface, and a c...
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JP2002261538A |
To provide a helical antenna that can be manufactured easily and can well maintain dimensional accuracy.This helical antenna has one set of radiating sections composed of two conductor wires wound spiral in form around its body section A...
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JP2002261536A |
To provide a small-sized antenna that has stable communication characteristic and superior durability and to provide a method of inexpensively manufacturing such an antenna.This small-sized antenna 1A is constituted of a plurality of sin...
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JP2002261525A |
To provide a GPS antenna unit for two-wheeled vehicle that can be fitted to a two-wheeled vehicle without impairing the fine view of the vehicle.This GPS antenna unit, which is fitted to a two-wheeled vehicle and receives radio waves fro...
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JP2002529948A |
A rotating field antenna is provided which includes a figure eight shape loop, a center loop magnetically coupled to the figure eight shape loop, and a drive element for driving the figure eight loop. The figure eight shape loop has an u...
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JP3323030B2 |
PURPOSE: To use an antenna in common for mobile communication and mobile body satellite communication by selecting properly a parameter at a frequency of each system so as to form the radiation directivity suitable for each system. CONST...
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JP3323113B2 |
To provide a laminated chip antenna, capable of suppressing the level of radio signals to be transmitted so as not to affect human bodies and easily providing suitable directivity. This antenna is provided with a base body 20 which is co...
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JP2002246837A |
To provide a circularly polarized wave antenna to be used for communication between a static satellite and a mobile station, which is suitable for miniaturization, and resistant to vibration.A dielectric substrate 3 constituted of dielec...
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JP3317521B2 |
[Object] To provide a method of manufacturing a helical antenna for satellite communications which has no local bent, etc. in the completed helical coil even though the conductor wire used is of an extremely pliable material, so that a h...
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JP3318475B2 |
To provide a compact and highly sensitive shared antenna which is suitable to both satellite communication and terrestrial communication by properly placing a microstrip line planar antenna and a helical antenna. A helical antenna 9 is o...
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JP3317522B2 |
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JP2002525899A |
An antenna which can be operated in a number of frequency bands and has at least one part which encloses an area and at least one part which does not enclose an area, with the at least two parts including a single conductor part being co...
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JP3314654B2 |
To easily secure the electrical matching and to improve the voltage standing wave ratio, the efficiency and the gain respectively by providing plural radiation conductors on the cylindrical dielectric outer wall, connecting electrostatic...
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JP3311758B2 |
A folded broadband antenna provides a symmetrical radiation pattern comparable to corresponding planar antennas (such as a planar spiral). The folded antenna can be integrated into a leading edge radome, eliminating the forward antenna c...
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JP3311826B2 |
PURPOSE: To obtain a microstrip antenna where the adjustment of a resonance frequency is easy. CONSTITUTION: This microstrip antenna is the one where an antenna conductor 2 and an earth conductor 3 are formed at the front and the back su...
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JP3311857B2 |
PURPOSE: To reinforce a coaxial cable connecting to a primary radiator without losing various electric characteristics such as a radiation pattern and a VSWR characteristic. CONSTITUTION: The system has a structure of a center feed type ...
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JP2002523949A |
The present invention relates to problems with how to achieve a reliable and efficient connection between circuitry in a radio communication device and an extendable and retractable antenna device, which is operable in both extended and ...
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JP3306560B2 |
PURPOSE: To attain miniaturization as improving the performance of a resonance tag by forming the resonance tag with the one of two-plane coil system as against a conventional one of single-plane system. CONSTITUTION: Capacitor electrode...
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JP3307070B2 |
PURPOSE: To improve a gain by radiating the electromagnetic waves of respectively different frequency bands with a patch antenna mounting a center short- circuiting and degenerative separating element and a dipole antenna formed at its u...
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JP2002521901A |
The invention relates to the design of radio electronic devices and, more particularly, to antenna-and-feeder facilities to be used in portable (pocket) receiver-indicators of the GPS and GLONASS satellite radio navigation systems (SRNS)...
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JP3299949B2 |
To improve the structure of an antenna sensor and a fastening system of a magnetic field detecting device to heighten the reliability of detected data by grounding a wire of an antenna sensor on the outside of a waveguide tube. A magneti...
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JP3300844B2 |
To realize the dual function operation by connecting 1st and 2nd feeders, feeding power to a primary antenna element acting in the 1st mode and tuning an upper choke and a metallic layer with a radio frequency of a signal sent/received i...
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JP3300281B2 |
To provide a helical antenna which has sufficient strength for bending or pulling and has wide band characteristics similar to those of a monopole antenna. In a state that a whip antenna is retracted, capacitance is generated a small gap...
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JP3297601B2 |
To improve the directivity of a low elevation angle and an axial ratio at the low elevation angle in a antenna, having a circular-polarized mode, by electrically connecting a helical antenna to the grounded conductor of a microstrip plan...
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JP2002164730A |
To provide an antenna device with a finite ground plate capable of changing the maximum antenna gain direction of vertical cross-sectional radiation characteristics, and miniaturizing this device.This monopole antenna 8 with a finite gro...
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JP2002164727A |
To provide a chip antenna capable of improving at least one of productivity, adjustability, and mountability.This chip antenna is provided with a pedestal 1 and a conductive film 2 spirally formed on the side face interposed between both...
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JP3287987B2 |
To easily adjust a radiation beam direction and an operation frequency by increasing/decreasing the amount of an external dielectric present around the external conductor of a coaxial line and adjusting a resonance frequency. For a helic...
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JP3286512B2 |
To provide a monopole antenna with corner reflector with which design or assembly for providing required directional characteristics is facilitated and miniaturization can be simultaneously attained as well. A radiator 11 is projected on...
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JP3286543B2 |
To restrain the deterioration of antenna gain, to share an antenna holder and to reduce a cost by disposing capacitors inserted in series between antennas at the opposite separated position in the longitudinal direction of the antennas t...
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JP3286890B2 |
To provide an antenna element for performing self-phasing by using a dielectric. This self-phasing antenna element provided with the two pairs of arms 110, 120, 130 and 140 in cross relation transmits and receives signals at a resonance ...
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JP2002151941A |
To provide a directive antenna for detecting a position of a mobile terminal, which uses the mobile terminal so as to detect the azimuth or the position of the terminal in a digital mobile wireless system forming pico cells.An inner heli...
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JP2002151926A |
To provide an antenna that can easily be formed to have a low profile and a small size at a low cost.The antenna is provided with a main body 40, a conductive layer 42 installed while being coated on an inner diametrical face of a throug...
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JP3282082B2 |
PURPOSE: To provide a circular polarized wave linear antenna which has the inexpensive components and has a shape suited for a mobile object by positioning a feeding point at the first turn of a square loop conductor which has a 7/4 turn...
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JP3280095B2 |
PURPOSE: To obtain a conical beam in a desired direction by a small number of phase shifters and to improve the gains in a wide range of angles of elevation by providing a selecting circuit which selects the feeding terminals of plural h...
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JP2002124810A |
To provide an electronic device with a retractable antenna which can be arranged so as not to be electromagnetically coupled with the noise generating source of an electronic device.An antenna is loaded with a spring and extended beyond ...
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JP2002512748A |
The present invention presents an antenna device for an automotive vehicle wherein a first coil is installed horizontally to receive radio signals. Capacitors are connected electrically and in parallel with the first coil. A second coil ...
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JP3277755B2 |
PURPOSE: To provide a primary radiator used in a microwave band capable of obtaining satisfactory cross polarized wave characteristic and impedance characteristic while keeping desired directivity and to miniaturize the radiator lighten ...
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JP3277754B2 |
PURPOSE: To provide a small-sized helical antenna without attitude dependency of sensitivity having sensitivity at least in the directions of a main polarized wave and a cross polarized wave of conductor winding axis and perpendicular to...
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JP2002100927A |
To provide a composite antenna mounted, with an antenna for circularly polarized wave reception and an antenna for linearly polarized wave reception, for which the number of parts and manufacturing cost are reduced.The composite antenna ...
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JP2002094321A |
To provide a spiral antenna whose gain can be obtained at a distance between a spiral conductor and a cavity bottom face corresponds to a frequency, with respect to a half-wavelength or sufficiently closer to full wavelength.A groove is ...
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JP2002094322A |
To solve the problem of the conventional spiral antenna that has had a narrower beam width, because the conventional spiral antenna employs a cavity whose bottom face has a planar structure.The spiral antenna of this invention adopts a c...
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JP2002090438A |
To provide a device for detecting location of a radio transmission source capable of easily specifying the location of the radio transmission source of a short-wave band by a unit.A vertically polarized wave antenna element for receiving...
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