JP2000068866A5 - - Google Patents

Description

[0007]
[Means for Solving the Problems]
In order to solve the above problems, a transmitter according to the present invention and a wobbler using the same are a circuit board on which a microwave oscillation circuit is disposed, and a circuit board disposed so as to cover the circuit board and connected to a ground conductor. And a shield configured to modulate and transmit microwaves emitted by the microwave oscillation circuit with a control signal, wherein the hole-like slot formed in the vicinity of the microwave oscillation wiring pattern in the shield serves as a transmitting antenna It is characterized by The slot may be formed on the cover wall or side wall of the shield case itself, or may be formed on a printed circuit board ground conductor surface which is not a shield case but is a part of a shield having a shielding effect.

[0008]
In the above configuration, the slots are arranged in a plurality of slots having different polarization directions, each within a distance of 1/2 or less of the transmission frequency wavelength, and switching is performed by switching microwaves having different polarization directions. It is preferable to have multiple antennas.
In the above configuration, in order to make the main polarization direction of the microwave generated by the microwave starting circuit having two slots and the two slots as the main transmitting antenna, respectively, substantially orthogonal to the slots, It is preferable that the main microwave current flowing in the circuit is disposed in the same shield case so that the directions of the main microwave currents are substantially orthogonal.

Claims (8)

A circuit board on which a microwave oscillation circuit is disposed, and a shield disposed to cover the circuit board and connected to a ground conductor, the microwave emitted by the microwave oscillation circuit is modulated by a control signal and transmitted In the transmitter serving as the remote control transmitter, the slot formed in the vicinity of the wiring pattern for microwave oscillation in the shield is used as a transmitter antenna . A plurality of said slots which are a plurality of slots different in the length direction and arranged respectively within a distance of 1/2 or less of the transmission frequency wavelength, and which switches and oscillates microwaves different in polarization direction The transmitter according to claim 1, wherein In order to make the main polarization direction of the microwaves generated by the microwave starting circuit having two slots as the main transmitting antenna respectively , the slots flow in the circuit so as to be substantially orthogonal to the slots. 3. The transmitter according to claim 2, wherein the directions of the main microwave currents are arranged in the same shield case so as to be substantially orthogonal. The circuit board has a substantially rectangular shape, and two microwave oscillation wiring patterns are arranged along each of two orthogonal sides, and the microwave oscillation wiring pattern on the circuit board A control signal terminal portion of the microwave oscillation circuit is provided at a position corresponding to a corner formed by two sides where no portion is disposed, and a portion of the shield case covering one circuit board, the portion corresponding to the corner is notched The transmitter according to claim 3, wherein the transmitter is a part. A top plate and a base for supporting the top plate, the main body incorporating a heater, the top plate incorporating a remote control transmission unit for modulating and transmitting microwaves with a control signal, and the main body transmitting the remote control A transmitter for receiving a microwave transmitted from the receiver and demodulating a control signal to control the built-in heater, the transmitter including a circuit board on which a microwave oscillation circuit is disposed; A shield disposed so as to cover the circuit board and connected to the ground conductor , wherein a hole-like slot formed in the vicinity of the microwave oscillation wiring pattern in the shield is used as a transmission antenna . The plurality of slots are a plurality of slots having different polarization directions, each being disposed within a distance of 1/2 or less of the transmission frequency wavelength, and a plurality of antennas that switch and oscillate microwaves having different polarization directions. The swing according to claim 5, wherein In order to make the main polarization direction of the microwaves generated by the microwave starting circuit having two slots as the main transmitting antenna respectively , the slots flow in the circuit so as to be substantially orthogonal to the slots. 7. The cage according to claim 6, wherein the directions of the main microwave currents are arranged in the same shield case so as to be substantially orthogonal. The circuit board has a substantially rectangular shape, and two microwave oscillation wiring patterns are arranged along each of two orthogonal sides, and the microwave oscillation wiring pattern on the circuit board A control signal connection terminal portion of the microwave oscillation circuit is provided at a position corresponding to a corner formed by two sides in which a portion is not disposed, and a portion of the shield case covering one circuit board is cut off at the corner The sway of claim 7, which is a notch.