초록

A microstrip plane antenna and a helical antenna are arranged substantially in line therewith. A base conductor of the microstrip plane antenna is electrically coupled with the helical antenna, thereby allowing stable communications with a orbiting communications satellite in the sky.

대표청구항 ▼

[ What is claimed is:] [1.] A composite antenna comprising:a microstrip plane antenna which possesses a circularly polarized wave mode and is made up of a conductive plate serving as a common base conductor, a dielectric layer provided on the conductive plate, and a patched radiating element provide

[ What is claimed is:] [1.] A composite antenna comprising:a microstrip plane antenna which possesses a circularly polarized wave mode and is made up of a conductive plate serving as a common base conductor, a dielectric layer provided on the conductive plate, and a patched radiating element provided parallel to the conductive plate with the dielectric layer between them;at least one linear radiating element having a helical shape and disposed in a substantially coaxial relationship with respect to the microstrip plane antenna and is provided below the conductive plate; andthe upper ends of the linear radiating element being connected to the conductive plate by DC or capacitive coupling, thereby forming a helical antenna.