42results about How to "Realize wideband" patented technology

A mobile phone antenna has: a first conductive radiation element that is formed in a sheet metal conductor and resonates at a predetermined resonance frequency; a second conductive radiation element that is formed in the sheet metal conductor and resonates at the predetermined resonance frequency; and a ground that is connected through a conductive ground connector with the second conductive radiation element. The ground is placed such that the ground is not opposed to the first and second conductive radiation elements.

The invention discloses a single channel dual base station ultra-short wave signal spatial positioning method and belongs to the technical field of ultra-short wave radio position finding. According to the method, a dual base station positioning system is constituted of a single channel Doppler antenna array and a reference antenna; phase positions are extracted directly from simulation signals to act as data base; two-dimensional information of azimuth angle and pitch angle is converted to one-dimensional information by use of space included angles, match searching is performed to data base and measured phase positions by use of a similarity measurement function to obtain azimuth angle of a target source. By use of the method, aerial ultra-short wave radio-frequency signals can be accurately positioned, the real-time performance of a direction-finding system is increased, system cost and complexity are reduced, and labor and economic investment are saved; the method is of great practical importance.

The invention discloses a broadband flat plate array antenna, broadband can be achieved, and array antenna gain can be improved. According to the broadband flat plate array antenna, a coupling groove is used for stimulating two micro-strip subarrays, at the time, the impedance of a single micro-strip wire is high, a radiation paster can easily carry out high-impedance matching, accordingly the bandwidth of the micro-strip subarrays is widened, broadband is achieved, the relative bandwidth (Sll < -10 dB) of the feeding mode can reach 16%, 1 dB gain bandwidth can reach 14.6%, and common structure bandwidth is only about 6%. In addition, an H-shaped base chip is used for integrating a waveguide feeding network, the micro-strip subarrays are connected in parallel for feeding, along with increasing of array units, the bandwidth is hardly changed, broadband features can be kept in a large array, and array antenna gain can be improved gradually. In addition, the feeding network is placed below the micro-strip subarrays, extra circuit area cannot be increased, and array antenna miniaturization is promoted. The broadband flat plate array antenna is suitable for promotion and application in the technical field of microwave and millimeter wave antennas.

The invention belongs to the technical field of microwave and millimeter wave antennas, and discloses a broadband metal flat panel array antenna, a radar, and a wireless communication system. The feed network layer and the upper radiation unit layer; there is a transition structure between the feed network layer and the feed network layer, and a step is introduced on the ridge of the ridge gap waveguide in the feed network layer for transition; the feed network layer and the radiation unit There is a transition structure between the layers, and a metal ridge is introduced at the port of the feed network layer to guide the energy transition. The invention uses an all-metal structure, and the simple three-layer metal plate is fixed by screws, which is convenient for assembly and use. The present invention adopts the double-layer gap waveguide as the feeding network, so that the overall structure of the antenna is compact and the profile is low, and wide bandwidth is realized. The invention uses a simple radiation unit, removes the air cavity, reduces the antenna section and realizes a wide frequency band in the millimeter wave frequency band.

The invention discloses a drone operator positioning system and method based on an aerial radio monitoring platform, and belongs to the technical field of radio direction finding and positioning. The invention includes an airborne direction finding system and a ground control system. The airborne direction finding system measures the incoming wave direction where the maximum energy of the target signal appears, and determines the position; the ground control system remotely controls the airborne direction finding system and the air monitoring platform, and obtains the positioning in real time. result. The airborne direction finding system collects and compresses the target signal, extracts the frequency hopping signal, and matches the azimuth angle, GPS position and time information with the frequency hopping signal in real time; the ground control system controls the air monitoring platform to change the air attitude, so that the airborne measurement Determine to the system the incoming wave direction where the maximum energy of the target signal appears. The present invention is applicable to areas where multi-point ground monitoring equipment is unconditionally erected in complex urban environments, saves manpower and funds, and realizes wide-band, all-round, and high-precision spatial positioning of frequency-hopping signals of remote controllers.

The invention relates to a digital television transmitting antenna based on an E-shaped patch. The digital television transmitting antenna comprises a formation plate, the E-shaped patch, a rectangular parasitic patch, an input connector and a retaining screw, wherein the rectangular parasitic patch, the E-shaped patch and the formation plate are orderly arranged in parallel from top to bottom to form a main structure of a stacked antenna; the E-shaped patch is provided with two symmetric rectangular gaps, and the length of a middle wing is smaller than that of two sides; an outer conductor of the input connector is fixed on the formation plate, and an inner conductor of the input connector penetrates through the formation plate and is connected to the E-shaped patch to feed; the rectangular parasitic patch at the upper layer is coupled by the E-shaped patch to feed. The digital television transmitting antenna based on the E-shaped patch provided by the invention satisfies the use requirement of a terrestrial television broadcasting transmitting system by adopting a multi-resonator technology to improve the impedance bandwidth and power handling of antennas; the invention has the characteristics of being wide in working band, high in gain, small in input standing-wave ratio, high in power handling, simple in processing, convenient in debugging and the like, and is applicable to a terrestrial television transmitting antenna system of a decimeter wave band.

The invention discloses a multi-frequency array antenna, which includes a metal reflector and a low-frequency radiation array composed of at least one low-frequency radiation unit and a high-frequency radiation array composed of at least one high-frequency radiation unit arranged on the metal reflector, wherein , defining an axis parallel to the longitudinal direction of the metal reflector, at least one of the low-frequency radiation arrays is arranged along the axis; the low-frequency radiation unit includes at least one radiation arm, and the high-frequency radiation unit is arranged at Above the radiation arm of the low frequency radiation unit and / or between two low frequency radiation units. The multi-band array antenna of the invention effectively reduces the lateral size, has superior electrical performance, is convenient to install, and has high reliability.

The invention discloses a tri-band mobile phone antenna. The tri-band mobile phone antenna includes a double-sided substrate, a cuboid which is located at the perigon of the upper surface of the double-sided substrate and is integrally connected with the double-sided substrate, a first strip which winds the cuboid along the upper surface and side surfaces of the cuboid, a second strip which winds the cuboid in a bent manner along the side surfaces of the cuboid, a feeding part, a grounding end and a grounding groove; the grounding groove is in the shape of a rectangle; and an inverted L-shaped strip matched with the grounding groove is arranged in the grounding groove. The tri-band mobile phone antenna can realize tri-band communication, and has the advantages of small size, simple structure and low cost.