JPS5833760Y2 - booster unit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a booster unit using a high power module using microwave band device elements in a microwave radio device.

Conventionally, booster units using high-power elements have had high-power elements and peripheral circuitry mounted on a part of the carrier of a unit with a heat dissipation fin structure, and connected with a microwave transmission line such as a strip line to form a booster circuit.

In addition, the structure of the unit includes a shield wall for each circuit to prevent mutual interference of microwaves, and a radio wave absorber to absorb waveguide mode electromagnetic interference traveling in the rectangular space of the unit, or Measures have been taken to place a conductive block on the transmission line side of the circuit to make the rectangular space less than the waveguide mode.

However, depending on the above-mentioned means, the shield wall differs depending on each circuit configuration, resulting in the following drawbacks.

(1) Productivity of the unit housing is poor.

(2) Complete shielding is difficult.

(3) The use of conductive blocks reduces the mounting space.

(4) The size of the block varies depending on the shape and length of the transmission line.

Therefore, the present invention solves the above-mentioned drawbacks with a simple structure, and its features are that a microwave transmission line is provided on the back side of the carrier on which the high-power module is mounted, and that the microwave transmission line side of the carrier is provided with a microwave transmission line. A heat dissipation fin is provided, and a groove below the waveguide mode of the transmission frequency band is provided along the microwave transmission line on the contact side between the heat dissipation fin and the back surface of the carrier.

An embodiment of the present invention will be described in detail below with reference to the drawings.

The figure is a cross-sectional view of the microwave radio device according to the present invention.
1 is the main body of the booster unit housing, 2 is the cover of the housing, and 3 is a coaxial waveguide converter, which converts the signal amplified by the booster into a waveguide mode, and converts the signal amplified by the booster into a waveguide mode. It is radiated from the antenna via a duplexer feeder, etc.

Further, 4 is a signal input connector from the transmitter, 5 is a fin that releases heat from the high power module, and 6 indicates the high power module.

This module has a structure in which each circuit function is packaged in a metal case, and its output terminals are mounted vertically, so that each circuit function is completely shielded.

Reference numeral 7 denotes a transmission line such as a stripline that connects each module 6, and the module signal is converted to a stripline and transmitted from an output terminal extending perpendicularly to the unit case carrier.

Note that the terminals of the module are transmitted as a coaxial line with a hole in a part of the housing carrier.

Furthermore, 8 is a groove for guiding a transmission line such as a stripline, and is a guide groove for a waveguide mode or less (+λ or less) in a transmission frequency band.

As detailed above, it is possible to prevent interference of signals other than the determined transmission paths such as strip lines, and since the guide grooves are functionally small, contact between the radiation fins and the carrier part of the unit housing body can be prevented. Since the area can be increased, the contact thermal resistance has the effect of being reduced, and this effect is significant in practical use.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the present invention. 1... Housing body, 2... Cover, 3.
...Coaxial waveguide converter, 4 ... Connector, 5 ... Fin, 6 ... High power module, 7 ... Transmission line , 8... Guide groove.

Claims (1)

[Scope of utility model registration request] A microwave transmission line is provided on the back side of the carrier on which the high power module is mounted, and a radiation fin is provided on the microwave transmission line side of the carrier, and the radiation is transmitted along the microwave transmission line on the contact side between the radiation fin and the back side of the carrier. A microwave booster unit characterized by having a groove below the waveguide mode frequency band.