5 results about "Monopulse antennas" patented technology

The application provides a leaky-wave antenna array based on a multimode substrate integrated waveguide coupler, relates to the technical fields of wireless communication and radar, and comprises a dielectric substrate, a multimode substrate integrated waveguide coupler and two leaky-wave antenna units. The multimode substrate integrated waveguide coupler is integrated on the dielectric substrate and is configured to excite modes and modes of the substrate integrated waveguide respectively in the same frequency range, generate even-mode signals with equal amplitude and in-phase and odd-mode signals with equal amplitude and opposite phase. The two leaky-wave antenna units are symmetrically arranged on the two sides of the upper surface metal layer of the dielectric substrate and are connected with two output ports of the multimode substrate integrated waveguide coupler respectively. The two leaky-wave antenna units are configured to radiate a wave beam and a difference wave beam in response to the even-mode signals and the odd-mode signals. The application solves the problem of low measurement accuracy of a traditional single-pulse antenna, has the technical effects of simplifying the design of a feed network, improving radiation performance and thus improving measurement accuracy.

The application provides a leaky-wave antenna array based on a multimode substrate integrated waveguide coupler, relates to the technical fields of wireless communication and radar, and comprises a dielectric substrate, a multimode substrate integrated waveguide coupler and two leaky-wave antenna units. The multimode substrate integrated waveguide coupler is integrated on the dielectric substrate and is configured to excite modes and modes of the substrate integrated waveguide respectively in the same frequency range, generate even-mode signals with equal amplitude and in-phase and odd-mode signals with equal amplitude and opposite phase. The two leaky-wave antenna units are symmetrically arranged on the two sides of the upper surface metal layer of the dielectric substrate and are connected with two output ports of the multimode substrate integrated waveguide coupler respectively. The two leaky-wave antenna units are configured to radiate a wave beam and a difference wave beam in response to the even-mode signals and the odd-mode signals. The application solves the problem of low measurement accuracy of a traditional single-pulse antenna, has the technical effects of simplifying the design of a feed network, improving radiation performance and thus improving measurement accuracy.

The application discloses a compact full-metal multi-beam single-pulse antenna, and belongs to the technical field of antennas.The application solves the problems of narrow bandwidth, low feed efficiency and small mechanical strength of a one-dimensional multi-beam single-pulse antenna.The technical points of the application are as follows: the compact full-metal multi-beam single-pulse antenna is composed of a sum-difference comparator based on a half-height slot gap waveguide and a planar dragon's breath lens composed of sliding symmetrical pins.The sum-difference comparator comprises two feed ports, two sections of slot gap waveguides with different widths and a matching pin.The application is suitable for a large-view-field multi-beam single-pulse radar system.

The application relates to a method for realizing a sidelobe-cancelling beam of a phase-frequency scanning monopulse antenna, and belongs to the technical field of antennas. By virtue of the technical advantages of an active phase-frequency scanning antenna system, a sidelobe-cancelling beam is realized by giving a set of specific amplitude-phase weighting and optimizing combination of an antenna beam, the influence of a space interference signal on the performance of a radar is reduced, the actual measurement effect reaches the expected target, and the method can be used as a reference for realizing a sidelobe-cancelling beam.

The invention discloses a rapid optimization method of a monopulse antenna narrow beam, and relates to rapid optimization of a four-horn feed source array monopulse antenna narrow beam based on the combination of a genetic algorithm, a geometrical optical method and an aperture field method. In the proposed optimization technology, far-field beam characteristic analysis of the monopulse antenna is completed by adopting an analytic expression method combining geometrical optics and an aperture field method, and analytic expression calculation of monopulse beams is nested in a genetic algorithm, so that an integrated design program of monopulse antenna far-field beam analysis calculation and beam optimization is realized. Compared with the modeling and manual parameter adjustment optimization process of the traditional full-wave simulation software, the method provided by the invention has the advantages that the modeling step is omitted, and meanwhile, the occupied hardware resources in the beam analytic expression calculation process are relatively less, so that the calculation speed is higher, the time cost of design optimization is lower, and the optimization efficiency is high.