4results about How to "Increase electrical length" patented technology

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.

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.

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.