Composite antenna
First Claim
Patent Images
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; and
the upper ends of the linear radiating element being connected to the conductive plate by DC or capacitive coupling, thereby forming a helical antenna.
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Abstract
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.
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Citations
5 Claims
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1. A composite antenna comprising:
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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; and the upper ends of the linear radiating element being connected to the conductive plate by DC or capacitive coupling, thereby forming a helical antenna. - View Dependent Claims (2, 3, 4)
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5. A composite antenna comprising:
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a conductive plate; a patched radiating element disposed above the conductive plate and parallel thereto; a dielectric layer disposed between the conductive plate and the patched radiating element; and at least one linear radiating element disposed below the conductive plate and having a helical shape defined around an axis which is substantially perpendicular to the conductive plate, one end of the linear radiating element being connected to the conductive plate by DC or capacitive coupling.
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Specification