Circularly polarized wave antenna and device using the same
First Claim
1. A circularly polarized wave antenna comprising:
- a substantially circular dielectric substrate;
a radiation electrode for transmitting and/or receiving a circularly polarized radio wave disposed on the upper face of the dielectric substrate;
a fundamental mode feed electrode for feeding power to the radiation electrode to excite the radiation electrode in a fundamental mode; and
a higher mode feed electrode for feeding power to the radiation electrode to excite the radiation electrode in a higher mode;
wherein said fundamental and higher mode feed electrodes are formed on the side peripheral face of the dielectric substrate and configured so as to feed the power to the radiation electrode via capacitive coupling.
1 Assignment
0 Petitions
Accused Products
Abstract
A radiation electrode is formed on the upper face of the substantially columnar dielectric substrate. Feed electrodes for a fundamental mode and for a higher mode are formed on the side peripheral face of the dielectric substrate. Power is supplied through the respective feed electrodes to the radiation electrode via capacitive coupling. The radiation electrode has both of the functions in the fundamental and higher modes. Thus, the circular polarized wave antenna can be reduced in size. Furthermore, since a capacitive feeding system is employed as described above, the respective resonance frequencies in the fundamental and higher modes can be easily adjusted and set at predetermined frequencies. Also, the circularly polarized wave characteristics in the fundamental and higher modes can be easily enhanced, respectively.
-
Citations
12 Claims
-
1. A circularly polarized wave antenna comprising:
-
a substantially circular dielectric substrate;
a radiation electrode for transmitting and/or receiving a circularly polarized radio wave disposed on the upper face of the dielectric substrate;
a fundamental mode feed electrode for feeding power to the radiation electrode to excite the radiation electrode in a fundamental mode; and
a higher mode feed electrode for feeding power to the radiation electrode to excite the radiation electrode in a higher mode;
wherein said fundamental and higher mode feed electrodes are formed on the side peripheral face of the dielectric substrate and configured so as to feed the power to the radiation electrode via capacitive coupling. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
-
-
7. A communication device comprising at least one of a transmitter and a receiver and a circularly polarized wave antenna coupled to the at least one of a transmitter and a receiver, the circularly polarized wave antenna comprising:
- a substantially circular dielectric substrate;
a radiation electrode for transmitting and/or receiving a circularly polarized radio wave disposed on the upper face of the dielectric substrate;
a fundamental mode feed electrode for feeding power to the radiation electrode to excite the radiation electrode in a fundamental mode; and
a higher mode feed electrode for feeding power to the radiation electrode to excite the radiation electrode in a higher mode;
wherein said fundamental and higher mode feed electrodes are formed on the side peripheral face of the dielectric substrate and configured so as to feed the power to the radiation electrode via capacitive coupling.
- a substantially circular dielectric substrate;
Specification