42 results about "Planar monopole antenna" patented technology

A planar monopole antenna is provided. The planar monopole antenna comprises a ground plate, a radiating metal plate, and a multi-branch feeding metal plate. The multi-branch feeding metal plate is formed between the ground plate and the radiating metal plate, and has a single feeding point thereon. The radiating metal plate and the multi-branch feeding metal plate together can also be fabricated from a single metal plate by using a line-cutting or stamping technique, or formed on a same dielectric substrate by using a printing or etching technique. Thus, the planar monopole antenna is easy to construct at a low cost.

The invention provides a dual-band wide beam width millimeter wave microstrip antenna based on a planar monopole antenna. The dual-band wide beam width millimeter wave microstrip antenna comprises a dielectric substrate, a radiation patch, a reflecting floor and a coaxial feeder, the radiation patch and the reflecting floor are respectively arranged on both surfaces of the dielectric substrate, a U-shaped groove is formed in a front face of the radiation patch, the reflecting floor adopts a planar patch in the form of the monopole antenna, and the coaxial feeder penetrates through the dielectric substrate to connect the radiation patch and the reflecting floor. The dual-band wide beam width millimeter wave microstrip antenna provided by the invention effectively improves the communication efficiency of a radar system, reduces the effective radiation area of the antenna, greatly improves the semi-power beam width on a specified direction, effectively improves the anti-interference ability of the antenna in a combat communication system, is small in structure and is convenient to combine with a complete machine.

The invention discloses an ultra-wideband (UWB) planar monopole antenna with reconfigurable trap characteristic. The UWB planar monopole antenna with the reconfigurable trap characteristic comprises a dielectric substrate (1), and a metal coating and two micro electronic mechanical system (MEMS) switches which are positioned on the upper surface of the dielectric substrate (1). The metal coating comprises a radiation unit (2), a coplanar waveguide feeder (3) and a coplanar waveguide floor, wherein the coplanar waveguide floor comprises a first coplanar waveguide floor (7) and a second coplanar waveguide floor (8); and the radiation unit (2) forms a C-like groove (4) by etching. The antenna provided by the invention has a simple and compact structure and can switch the trap characteristic of the antenna by controlling on and off of the two MEMS switches so as to effectively work on the UWB frequency band, and realize generation or disappearance of a trap frequency band, thus improving the utilization ratio of the frequency band and the communication efficiency.

The invention relates to an adjustable 4G MIMO mobile phone antenna based on liquid metal. The adjustable 4G MIMO mobile phone antenna comprises a planar monopole antenna, a planar inverted F antenna,a liquid metal channel, liquid metal, a metal ground body and two L-shaped metal ground branches, wherein the monopole antenna is a main antenna, and can operate in eight frequency bands such as LTE700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300 and LTE2500. The planar inverted F antenna is an auxiliary antenna, and can cover five high frequency bands, higher than 1 GHz, such as DCS, PCS, UMTS, LET2300 and LTE2500, and inside the LTE700, GSM850 AND GSM900 frequency bands lower than 1 GHz, the resonant frequency can be changed by adjusting the length of the liquid metal. The isolation of the twoantennas inside the working frequency band is higher than 10 dB, the efficiency of the antennas can reach more than 60% in the low frequency bands and can reach more than 80% in the high frequency bands, and the adjusting length of the liquid metal is within 20 mm, so that fundamental requirements of the mobile phone antenna can be met. The antenna has the advantages of wide covering frequency bands, simple structure, easy manufacturing, high antenna efficiency, good isolation and the like.

The invention discloses an ultra-wideband planar monopole antenna. The ultra-wideband planar monopole antenna comprises a dielectric substrate, a monopole radiation patch, a lumped device and a grounding plate, wherein the monopole radiation patch is formed by loading a monopole antenna main body and a top end, a part, near to the grounding plate, of the monopole radiation patch employs a triangular corner and is mainly used for impedance matching of a high-frequency part. A lumped component loaded by the antenna main body is mainly used for reducing a working frequency band of the antenna andgain of a smooth antenna in the whole frequency band, a plurality of rectangular open-circuit branches are loaded at a top end of a monopole, the capacitance between the antenna and floor is improved, and the working frequency band of the antenna is further reduced. By loading the lumped component and additionally arranging open-circuit branches on ground, the antenna size is effectively reducedas well as favorable ultra-wideband characteristic is maintained, and the application of the antenna in the monitoring field is facilitated.

The present invention discloses a multi-input multi-output antenna system comprising a first radiation unit, a second radiation unit, a radiation floor, a dielectric plate and a parasitic element. The first radiation unit, the second radiation unit and the parasitic element are printed on an upper surface of the dielectric plate, and the radiation floor is printed on a lower surface of the dielectric plate. The first radiation unit and the second radiation unit are planar monopole antennas, and the parasitic element is positioned between the first radiation unit and the second radiation unit. The system in accordance with the present invention can implement miniaturization of the antennas, and ensure two ports of an antenna have high isolation while maintaining good radiation performance.

Embodiments of the invention provide an ultra-wide-band planar monopole antenna array, a communication device and terminal equipment. The ultra-wide-band planar monopole antenna array comprises a dielectric substrate, a first grounding plate, a second grounding plate, a neutral line, a radiation patch and a microstrip feeder line of a first planar monopole antenna, and a radiation patch and a microstrip feeder line of a second planar monopole antenna, wherein the first grounding plate and the second grounding plate are symmetrically printed on the lower surface of the dielectric substrate along a center line of the dielectric substrate respectively; the radiation patch and the microstrip feeder line of the first planar monopole antenna, and the radiation patch and the microstrip feeder line of the second planar monopole antenna are symmetrically printed on the upper surface of the dielectric substrate along the center line of the dielectric substrate respectively; and the two ends of the neutral line are connected with the radiation patch of the first planar monopole antenna and the radiation patch of the second planar monopole antenna respectively. By loading the neutral line on the antenna array, the antenna array can be decoupled, thereby greatly strengthening the isolation degree between antenna array elements; and in addition, the ultra-wide-band planar monopole antenna array is simple and convenient to implement.

The invention discloses a multi-band miniaturized planar monopole antenna which comprises a medium substrate, a first antenna radiation unit, a second antenna radiation unit, a micro-strip feeding line and a ground plate, wherein the first antenna radiation unit, the second antenna radiation unit, the micro-strip feeding line and the ground plate are made of copper material, and copper is applied to the surface of the medium substrate by using a laser technology or a corrosion technology. According to the multi-band miniaturized planar monopole antenna, only two radiation units are used, three bands are achieved, and the antenna is simple in structure, has no via hole and is easy to process and mold and low in cost. Miniaturization of the antenna is realized by using a circuitous flow method of the circuitous radiation units. The antenna of the invention adopts a feeding method combining direct feeding and coupled feeding, thus effectively improving impedance matching of the antenna. The antenna of the invention is suitable for a plurality of wireless communication frequency bands.

A planar monopole antenna comprises: a baseboard, a ground metal, a first sleeve like structure, a second sleeve like structure and a radiator. Said ground metal is formed in said baseboard, and said first and second sleeve like structures are connected to the ground metal, and are extended from one side edge of said ground metal to a first direction. In the first direction, said first and second sleeve like structures respectively have a first and a second length, and said side edge has a third length. Said radiator is formed on said baseboard and is located between said first and second structures. Said radiator shows a strip -like shape, and in the first direction has a fourth length equaling the sum of said first, second and third lengths.

The invention discloses a planar monopole and half-slot structure dual polarized antenna. A monopole radiation oscillator and a metal floor are respectively arranged on an upper surface and a lower surface of a dielectric substrate so as to jointly form a planar monopole antenna unit; a half slot is formed on the metal floor to form a half-slot antenna unit; a feed structure is composed of a metalconnection part and two feed ports penetrating in the dielectric substrate and being fixed therein, and the feed structure is used for performing electrical connection for the monopole radiation oscillator and the metal floor. Consequently, based on the characteristics of polarized orthogonality of the two antenna units, by different feed modes, two different line polarization waves on the same frequency are realized. Additionally, the planar monopole antenna unit and the half-slot antenna unit both have the characteristics of low profile, light weight and being easy to process, thus, the dual polarized antenna formed by the two units also has the advantages of being simple in structure, small in size and easy to process.

The invention discloses a circular or near-circular flat mono-pole antenna with bending slot on its ground, wherein the bending slot parallels to the antenna edge. This invention improves the resonance and frequency band, reduces antenna size, and plays key role for antenna research.

The invention discloses an antenna device, which comprises a planar monopolar antenna device and an extension layer. The planar monopolar antenna device is provided with an electromagnetic shielding box. The extension layer is made of conductive material and extends outwards from an antenna feed-in point of the electromagnetic shielding box of the planar monopolar antenna device.

The invention provides a graphene ultra wideband planar monopole antenna. The antenna includes a graphene radiator, a coplanar waveguide and a dielectric substrate. The graphene radiator and the coplanar waveguide are disposed on the dielectric substrate. The coplanar waveguide includes a signal wire and a ground wire. A lumped port is disposed between the signal wire and the ground wire. The antenna has a frequency band, which is can be covered, at a terahertz frequency band, the advantages of an ultra wideband, wave trapping, a higher gain and the like and certain guiding significance for wave trapping methods of the graphene antenna and methods of improving the antenna performance.

The invention discloses a coplanar waveguide feed directional diagram reconfigurable planar monopole antenna, which comprises a metal coating, two micromechanical system (MEMS) switches and a medium substrate. The metal coating comprises a radiation patch, a coplanar waveguide feeder line and a coplanar waveguide floor. The coplanar waveguide floor comprises a first coplanar waveguide floor, a second coplanar waveguide floor, a third coplanar waveguide floor and a fourth coplanar waveguide floor. The coplanar waveguide feed directional diagram reconfigurable planar monopole antenna is simple in structure, the state of the coplanar waveguide floor can be effectively changed only by controlling the on-off of a first MEMS switch and a second MEMS switch, therefore, the reconfiguration purpose of an antenna radiation directional diagram can be realized on the premise of maintaining the working frequency. The antenna is used for transmitting and receiving electromagnetic waves and has the characteristics of small size, light weight, convenience in machining and wide working band.

The invention discloses an earth plate slot radiation n-type parasitic structure multi-frequency planar monopole antenna, comprising: a square dielectric substrate; a monopole rectangular radiation arm disposed on the upper surface of the square dielectric substrate; an n-type metal parasitic structure disposed on the upper surface of the square dielectric substrate; and a metal earth plate disposed on the lower surface of the square dielectric substrate. The monopole rectangular radiation arm is a rectangular metal patch. The axis of the monopole rectangular radiation arm in parallel to a long arm passes through the center of the upper surface of the square dielectric substrate. A short side of the monopole rectangular radiation arm coincides with a first side of the upper surface of thesquare dielectric substrate, and the centers of two edges coincide with each other to serve as a feed port of the earth plate slot radiation n-type parasitic structure multi-frequency planar monopoleantenna. Two groups of rectangular slot structures are etched symmetrically on the metal earth plate. The earth plate slot radiation n-type parasitic structure multi-frequency planar monopole antennasolves the technical problems that the antenna of an existing wireless mobile communication system has a single operating frequency and thus leads to an increase in system complexity and a decrease inreliability.

A planar monopole antenna for dual-band Wi-Fi application is disclosed. The antenna has a ground copper and a radiation copper. The radiation copper is adhered to a substrate and has an arrowhead-shaped pattern connected to a long-wide pattern. The arrowhead and long-wide patterns are aligned along the longitudinal direction of the antenna. The ground copper is adhered to the substrate and has a rectangularly-shaped pattern with an opening at one end thereof for the reception of the base of the long-wide pattern of the radiation copper in the longitudinal direction. Reception of the radiation copper into the opening of the ground copper forms an U-shaped separation that is approximately 0.6 mm wide. The antenna has a gross span of approximately 45 mm and a width of approximately 7 mm.

The invention discloses a cup-shaped ultra-wideband planar monopole antenna with a ground plate of a stepped open-circuit structure. The cup-shaped ultra-wideband planar monopole antenna is composed of a dielectric substrate, a cup-shaped feed source terminal printed on the dielectric substrate, a coplanar waveguide feeder line, a ground plate of a stepped open-circuit structure and an externally-connected coaxial connector. The transverse size of the cup-shaped feed source terminal gradually decreases from top to bottom. Therefore, radiation bands with different frequencies are formed and theantenna has ultra-wideband characteristics. The ground plate of the stepped open-circuit structure is adopted, so that the resonance can be generated at the low-frequency position of the antenna. Thedesign size of the antenna is reduced. The upper end of the ground plate of the stepped open-circuit structure is of the stepped structure, so that the impedance matching can be further adjusted. A rectangular floor at the lower end of the ground plate of the stepped open-circuit structure is subjected to arc angle cutting treatment, so that the impedance bandwidth of the antenna can be further broadened. The working frequency band of the antenna is 2.9 GHz - 13 GHz, and the design size of the antenna is 20 mm*20 mm. The antenna is excellent in both radiation characteristic and gain characteristic and suitable for an ultra-wideband wireless communication system.

The invention discloses a bipolar antenna with a planar monopole and a slot structure. A monopole radiation oscillator and a metal floor are set on an upper surface and a lower surface of a dielectricsubstrate, thereby jointly forming a planar monopole antenna unit. A slot is set on the metal floor to form a slot antenna unit. A feed structure unit is composed of a metal connection part and two feed ports which penetrate the dielectric substrate. The feed structure unit is used for carrying out electrical connection on the monopole radiation oscillator and the metal floor. Through utilizationof polarization orthogonal characteristics of the two antenna units, two different linearly polarized waves on the same frequency are achieved in different feed modes. The planar monopole antenna unit and the slot antenna unit are characterized by low profiles, light weight and easy processing, so the bipolar antenna formed by the planar monopole antenna unit and the slot antenna unit also has the advantages of a simple structure, a small size, and easy processing and production.