KR940027221A - Molded plastic microwave antenna - Google Patents

Abstract

Microwave radar antennas containing almost molded or extruded thermoplastic parts to be assembled as a finished product are electroless copper plated or electroplated with copper to produce radiofrequency conductivity. The finished semiassemblies are joined together to form a finished antenna. Molded and metallized plastic antennas utilize thermoplastics such as polyetheramides, ie, high strength, high temperature, suitable thermoplastics used for injection molding or extruding the microwave elements described above. The molded element is assembled into a microwave semi-assembly using epoxy adhesives, solvents or other mechanical assembly methods. These subassemblies are then electroless copper plated or electroplated to have radio frequency conductivity. The metalized semi-assemblies are then mechanically connected together to form a complete radar antenna that can replace heavy and expensive metallic radar antennas. In particular, molded and metallized plastic antennas include antenna openings and electromechanical phase shifters, central feeders with horizontal feed networks, interconnected waveguides, vertical feed networks with conventional rotary field phase shifters, and sum mono monopulses. It consists of a supply network. The antenna also has a suitable beam steering controller that provides beam steering and powering of the electronic antenna. Using the microwave antenna of the present invention employing molded and metallized plastic parts, the performance of the antenna is improved, the weight is reduced, and the manufacturing cost is reduced compared to the conventional metallic antenna.

Description

Molded plastic microwave antenna

Since this is an open matter, no full text was included.

1 is a schematic view of a molded plastic microwave antenna according to the present invention, FIG. 2 is a detailed view of the opening of the antenna shown in FIG. 1, and FIG. 3 is an exploded view of a centrally supplied molded waveguide assembly employed in the antenna of FIG. 4 is an exploded perspective view of the cross-coupled molded waveguide assembly employed in the antenna of FIG. 1, and FIG. 5 is a state in which the cross-coupled molded waveguide assembly and the centrally supplied waveguide assembly employed in the antenna of FIG. Exploded perspective view.

Claims (13)

An azimuth phase shifter assembly having a plurality of waveguides and antenna openings, a centrally fed waveguide assembly forming a horizontal supply to be connected to the azimuth phase shifter assembly, and the centrally fed waveguide assembly made of molded plastic and then metallized; A plurality of mutually coupled waveguides connected to each other, a plurality of rotary field phase converters respectively connected to the respective mutually coupled waveguides, and the rotary field phase converters made of molded plastic and then metallized. 10. An antenna comprising a plurality of vertical supply networks connected and a summed and subtracted monopulse supply network having an input port connected to the vertical supply network, wherein the azimuth phase converter assembly is formed of a plurality of molded plastics coated with metal after molding; Characterized by consisting of a waveguide portion Antenna that. 2. The antenna of claim 1 wherein the centrally fed waveguide assembly comprises a plurality of centrally fed molded plastic waveguide assemblies, wherein the components of the waveguide assembly are molded from plastic and then metallized. 3. The antenna of claim 2 wherein the plurality of centrally fed molded plastic waveguide assemblies are stacked in pairs to form a horizontal feed network. The antenna of claim 1, wherein the plurality of vertical supply networks are formed of plastic and then metallized. 3. The antenna of claim 2, wherein the plurality of vertical supply networks are molded from plastic and then metallized. 2. The antenna of claim 1 wherein the summation and subtraction monopulse supply network is molded from plastic and then metallized. 3. The antenna of claim 2, wherein the summation and subtraction monopulse supply network is molded from plastic and then metallized. 5. The antenna of claim 4 wherein the summation and subtraction monopulse supply network is molded from plastic and then metallized. 8. The antenna of claim 7, wherein the summation and subtraction monopulse supply network is molded from plastic and then metallized. 2. The apparatus of claim 1, further comprising a beam steering controller connected to the input port for electronic antenna beam steering, and a power supply means connected to the beam steering controller to supply power to the beam steering controller. An antenna characterized in that. The antenna of claim 1 wherein the azimuth phase shifter assembly is an electromechanical azimuth phase shifter assembly. An azimuth phase shifter assembly for forming an antenna aperture, wherein the molded plastic waveguide portion comprises a plurality of molded plastic waveguide portions metallized after molding, wherein the molded plastic waveguide portions are stacked in pairs to form a plurality of waveguides; A horizontal feed network for forming a horizontal supply network connected to the azimuth phase shifter assembly, comprising: a plurality of centrally fed molded plastic waveguide assemblies made of molded and then coated metal parts, the centrally fed molded plastic waveguide The assembly comprises a centrally fed waveguide assembly stacked in pairs to form a horizontal feed network; A plurality of mutually coupled waveguides, each made of molded plastic and coated with metal, each connected to the plurality of centrally fed waveguide assemblies; A plurality of rotatable field phase transducers each connected to the plurality of mutually coupled waveguides; A plurality of vertical supply networks each connected to a selected one of said plurality of rotatable field-phase transducers, the metal supply being made of molded plastic and then covered with metal; An antenna comprising a summed and subtracted monopulse supply network made of molded plastic and having a metallized input port and connected to said plurality of vertical supply networks. 13. The apparatus of claim 12, further comprising a beam steering controller connected to the input port to enable electronic antenna beam steering, and a power supply means connected to the beam steering controller to supply power to the beam steering controller. Included with the antenna. ※ Note: The disclosure is based on the initial application.