Wide-beam high-gain dual-frequency circular polarization combination antenna

Abstract

The invention discloses a double-frequency circularly polarized combined antenna with a wide wave beam and a high gain. The antenna comprises a metal pedestal, which is provided with a metal frustum and a cross dipole antenna; and a microstrip antenna is arranged at the metal frustum. The metal frustum is composed of a metal base plate, a medium substrate and a metal paster, wherein the metal base plate, the medium substrate and the metal paster are superposed orderly. The metal paster is in a square shape whose two equal angles on a diagonal are cut off; and a coaxial cable is connected to the metal paster and an inner core of the coaxial cable is connected with the metal paster. A through hole is arranged at the center of the microstrip antenna. Besides, the cross dipole antenna comprises a rigid coaxial cable is arranged on the metal pedestal; the rigid coaxial cable passes through the metal frustum and the through hole of the microstrip antenna; and an end of the rigid coaxial cable is provided with a slit and a length of the slit is a quarter of an operating wavelength. In addition, a cross oscillator is also arranged at the end of the rigid coaxial cable as well as is composed of two short arms and two long arms; and the inner core of the rigid coaxial cable is connected with one short arm and one long arm.

Description

technical field [0001] In general, the antenna is required to have a very wide beam for receiving satellite downlink signals or transmitting signals to satellites, because in addition to synchronous satellites, general communication satellites and navigation satellites are under the passing orbit and are not stationary relative to the ground However, it is constantly moving. In order to ensure that the receiving equipment can receive satellite signals around the clock, it is a basic requirement to ensure that it has a wide beam. [0002] To this end, the present invention relates to a dual-frequency circularly polarized combined antenna, in which one antenna is composed of a curved cross oscillator, and one group is composed of a microstrip antenna. Through a suitable combination, a specific metal cone and a metal ground are designed. Therefore, it has excellent standing wave ratio, axial ratio, and hemispherical radiation pattern, and can be applied to satellite navigation an...

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Problems solved by technology

At present, there are a variety of practical antennas that can be applied to these technical fields, including helical antennas, microstrip antennas, etc. Generally speaking, it is difficult to make the beam width very wide

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