Ka-band Single-pulse Flat-panel Slot Antenna Feed Network

Waveguide slot antenna with a compact, thick, light weight, high aperture efficiency, easy to achieve low sidelobe characteristics, is widely used in radar and communications. Broadside array of vertical slot has a strong capacity and strong with embedded box structure can be widely used in fuze antennas, homing antenna, communication antenna, and other types of radar antennas. Waveguide slot antenna array in the composition including the radiation front and the feed network, comprehensive study of the corresponding antenna radiation front into an integrated and consolidated the two most of the feed network. This paper studies the distribution of single-pulse system based on Taylor Slot Array under the feed network integrated design, simulation and physical process from both an analysis of the structure in the sky wave communication applications. Specific job done as follows.First of all, summed up the feed network of several key combinations, according to the indicator chosen sub matrix standing wave center fed with a mixed network joint waveguide feed network, and poor power distribution and operations. Starting from the principle of a single pulse system analyzes the amplitude and phase imbalance between feed and the antenna, the impact of poor pattern, and then raised to the feed network design requirements.Then, from the monopulse waveguide slot antenna feed network structure that were designed and difference network with a network of sub-16 range from power points. Sum-subtraction network consists of three magic-T, a HT, a number of 90-degree bends and non-standard waveguides transition to standard waveguide and other components. Taking into account the thickness of the antenna restrictions, magic-T can only be made of two layers of waveguide. H-arm for the magic T1 and mouth, E mouth arm for the subtraction. Magic-T1 connection first and second quadrant of the feed waveguide, and the magic-T2 connecting the third and fourth quadrant of the feed waveguide. The sum ports (H-arm) of magic-T1 and magic-T2 connected to the side arms of magic-T3. The H-arm of magic-T3 is the sum port for the entire antenna, E arm for the pitch-sub.The sub arm of magic-T1 and magic-T2(E-arm) connect with H-T junction, the H-T junction formation of position-sub. Power divider network, power distribution unit is a patch loaded waveguide devices composed of H-T. As the front design is based on two vital distribution design, so they requested that fed power divider network must meet Taylor distribution, power distribution by adjusting the diaphragm of the offset, making arms of the power output to meet certain distribution ratio, and finally adjust 15 H-T cells together, you could form a sub-16 range from power splitter.Finally, processing of physical testing and simulation results are given comparing the structural design of feed network shows the feasibility.