11results about How to "Increase electrical length" patented technology

The invention discloses a low-profile ultra-wideband antenna and a working method thereof, and the antenna comprises a radiator which carries out the effective radiation of the antenna at a first frequency band; the antenna feed body and the radiating body are partially projected and overlapped along the direction vertical to the ground plane, and the projected and overlapped parts are mutually coupled to form a coupled feed structure; the antenna feed body is used for transmitting energy to the radiator and serves as the radiator to provide impedance matching in a second frequency band; the coupled feeding structure is used for carrying out coupled feeding, realizing impedance matching of the first frequency band and expanding the impedance bandwidth of the first frequency band; the branch antenna is used for providing radiation in a third frequency band and assisting the radiation of the parasitic antenna in a fourth frequency band; the parasitic antenna provides radiation in a fifth frequency band. The antenna is used for realizing ultra-wide frequency band coverage in a limited space, and good radiation performance and impedance matching effect can be provided in each frequency band.

The utility model discloses a microstrip patch antenna which comprises a dielectric substrate and a radiation patch. The radiation patch is arranged on the dielectric substrate, the radiation patch is E-shaped, the parallel edge of the E-shaped radiation patch is defined as a first sub-radiation patch, the vertical edge of the E-shaped radiation patch is defined as a second sub-radiation patch, and the length of the first sub-radiation patch is larger than or equal to 2.1 mm and smaller than or equal to 2.5 mm. The E-shaped structure enables the current to bypass between the first sub radiation patch and the second sub radiation patch, which is equivalent to increasing the electrical length of the radiation patch and reducing the resonant frequency of a fundamental mode, so that the low-frequency band bandwidth is broadened; the edges of the first sub-radiation patch and the second sub-radiation patch can generate strong electromagnetic field coupling to excite an additional parasitic resonance mode, so that the frequency band is further widened, and the bandwidth of the microstrip patch antenna is effectively widened. Wherein the first sub radiation patch of 2.1 mm to 2.5 mm enables the resonant frequency of the microstrip patch antenna to range from 43.7 Ghz to 55.1 Ghz, the relative bandwidth is 23%, and high bandwidth is achieved.

The invention discloses a cross dipole broadband antenna, which belongs to the field of wireless communication, has a dual-polarization characteristic and can support two mutually vertical polarization directions at the same time, and the high isolation and the optimized design of the dual-polarization antenna reduce signal attenuation and loss and ensure the reliability and the stability of a communication system. Moreover, the antenna is provided with a balun structure which can effectively cut off the high-frequency current flowing through the sheath of the cable shielding layer from the cross dipole patch, thereby ensuring the correct transmission of signals and good antenna performance. The Balun structure can realize the conversion between different impedances, so that the impedance between the antenna and the transmission line is matched, and the maximum power transmission is ensured; besides, the patch of the antenna adopts a novel fractal structure, namely a quartering circular fractal structure, so that the antenna performance is improved, the broadband characteristic is maintained while the light weight is realized, the frequency bandwidth is improved, and the radiation efficiency is optimized.

The utility model discloses a UHF electronic tag antenna and a UHF electronic tag. The UHF electronic tag antenna comprises a feed ring used for supplying power to a chip and an oscillator antenna extending from the feed ring to two sides, and is characterized in that the feed ring comprises a first connecting part and a second connecting part which are connected in series, and the first connecting part and the second connecting part form a double-line spiral structure; the connecting point of the first connecting part and the second connecting part is the starting point of the double-line spiral structure, and the closer to the connecting point, the smaller the line distance between the first connecting part and the second connecting part is. According to the utility model, the annular structure of the feed ring is optimized, the electrical length of the feed ring can be increased in a limited space, and when a UHF electronic tag is read and written, a chip can obtain energy more quickly through the feed ring, so that the read-write response speed of the electronic tag is improved.

According to the metal frame antenna system capable of integrating the low frequency band, the closed metal ring of the electronic equipment and the metal chain connected to the closed metal ring are utilized, and the low-frequency excitation source loaded between the mainboard and the closed metal ring is combined, so that the electrical length of antenna radiation is effectively increased, and the antenna performance is improved. A low-frequency special-shaped dipole mode is excited, low-frequency-band transmitting and receiving in a metal frame antenna system can be achieved, and the frequency band and the frequency width of the low frequency can be adjusted by adjusting the position relation between connection points of the low-frequency excitation source and the metal chain and / or the length of the metal chain. The metal frame antenna system is widened to a low frequency band while the attractiveness is ensured, and integration of low frequency and high frequency is realized; in addition, besides the low-frequency excitation source, other high-frequency excitation sources can be loaded between the mainboard and the closed metal ring according to needs, and the integration level of the antenna is further improved.

This invention discloses a miniaturized log-periodic antenna and its assembly and design methods, belonging to the field of communication antenna technology. The antenna includes a dielectric substrate, a semi-steel cable, an adapter plate, and a copper layer; the copper layer is disposed on the front and back sides of the dielectric substrate; an adapter plate is disposed at one end of the dielectric substrate; the outer shell of the semi-steel cable is welded to the copper layer at the center line of the back side of the dielectric substrate, and the inner core of the semi-steel cable is bent upwards through the side of the dielectric substrate without the adapter plate and then welded to the copper layer on the front side of the dielectric substrate; the antenna operates in the frequency band of 150MHz–400MHz, with a VSWR ≤2, and uses linear polarization. This invention addresses the performance shortcomings of traditional antennas in this frequency band by optimizing the structure of the vibrator and improving the feeding method, enabling it to cover the target frequency band while meeting the lightweight and miniaturized usage requirements of different scenarios.

The present invention provides a bandpass filter and an electronic device, the bandpass filter comprises a substrate, a first-order resonator and a second-order resonator arranged inside the substrate, and an input end and an output end respectively arranged at two ends of the substrate; the first-order resonator is located above the second-order resonator in the height direction of the substrate and the first-order resonator and the second-order resonator are partially cross-coupled; the first-order resonator and the second-order resonator both comprise a first compensation stripline, a main resonant stripline and a second compensation stripline, the first compensation stripline, the main resonant stripline and the second compensation stripline are sequentially arranged at intervals along the height direction of the substrate, and the main resonant stripline is U-shaped. Compared with the prior art, the bandpass filter of the present invention can maximize the use of the internal space of the bandpass filter, which is conducive to realizing the miniaturization design of the filter.

The present invention provides a high-isolation broadband antenna system. On the one hand, by setting a first metal branch node and a metal structural member to be electrically connected and grounded together, the electrical length thereof is effectively increased, low-frequency resonance is achieved, and then the resonance in the middle and high frequency bands is achieved in combination with the second metal branch node. On the other hand, by setting a third metal branch node and a fourth metal branch node with an asymmetric structure, and making the third metal branch node electrically connected to the grounding wire of the second coaxial line, the electrical length thereof is effectively increased, low-frequency resonance is achieved, and then the resonance in the middle and high frequency bands is achieved in combination with the fourth metal branch node. Furthermore, the third metal branch node and the fourth metal branch node are not directly electrically connected to the metal structural member, thereby improving the isolation between the two antenna structures. Finally, the first coaxial line and the second coaxial line are arranged as a "Y"-shaped routing, thereby further reducing the influence of the first coaxial line on the current on the grounding wire of the second coaxial line, thereby ensuring the simplicity of wiring and further improving the isolation between the two antenna structures.

The invention discloses an antenna assembly and electronic equipment. A first radiator comprises a first end, a feeding point and a second end. The second radiator and the first radiator are arranged in parallel and opposite to each other, and a coupling gap is formed between the second radiator and the first radiator; the second radiator comprises a third end, a grounding point and a fourth end which are arranged in sequence. One end of the tuning circuit is electrically connected with the grounding point, the other end of the tuning circuit is grounded, and the tuning circuit is used for increasing the electrical length of the second radiator; the second radiator forms a first resonance current flowing from the third end to the grounding point and passing through the grounding point to the ground and a second resonance current flowing from the fourth end to the grounding point and passing through the grounding point to the ground under the excitation of the signal source; the mode of the first resonance current and the mode of the second resonance current are both 1 / 4 wavelength modes of the first frequency band, and the length of the second radiator is (1 / 6-1 / 4) wavelength of the first frequency band. According to the antenna assembly and the electronic equipment provided by the invention, miniaturization is realized, and the occupied space is saved.

A laser direct structuring (LDS) antenna assembly for an in vivo device includes a carrier and one or more electrical contacts disposed on a first outer surface of the carrier and configured to electrically couple a PCB to a power source. The LDS antenna assembly also includes a helical antenna having a plurality of loops disposed on and coiled around the second outer surface of the carrier. The helical antenna includes a first feed connection configured to be connected to a first portion of the PCB and a second feed connection configured to be connected to a second portion of the PCB. The first feed connection and the second feed connection are configured to increase an impedance of the helical antenna. An antenna loop is embedded on the PCB and is configured to operate as one of the plurality of loops of the helical antenna to increase the electrical length of the helical antenna.

This invention discloses a 5G antenna for a mobile communication terminal and a mobile communication terminal. The 5G antenna includes a main radiating element and a parasitic element. The main radiating element includes a feed point, a feed point connecting segment connected to the feed point, and a first antenna stub and a second antenna stub respectively connected to both ends of the feed point connecting segment. The parasitic element is separated from the second antenna stub by a first isolation region. In this invention, by setting the first antenna stub and the second antenna stub separately in the main radiating element to adapt to the mid-high frequency band and low frequency band of 5G communication respectively, the antenna frequency band can be better distinguished for structural design, avoiding the problem of difficulty in balancing various frequency bands, thereby significantly improving antenna performance.