High average RF power resistant ferrite phase shifter

Abstract

A phase shifter capable of withstanding very high average RF power, which enables directing of the beam in radar systems, it includes a waveguide, a ferrite toroid, composite dielectric plate including a dielectric plate in high thermal conductivity and a dielectric plate with the high dielectric constant, which increases the amount of phase shift per the unit length by directing the electric field and the transfer of heat generated on the ferrite toroids to the waveguide, a twin-toroid ferrite-dielectric structure including a combination of ferrite toroids and composite dielectric plates.

Claims

1. A ferrite phase shifter capable of withstanding very high average RF power, which provides beam directing in radar systems, comprising: a waveguide; a ferrite toroid; a composite dielectric plate for transporting the heat generated on the ferrite toroid to the waveguide, wherein, the composite dielectric plate comprises a combination of a dielectric plate with high thermal conductivity and a dielectric plate with high dielectric constant to increase an amount of phase shift obtained from a unit length by directing the electric field; and a twin-toroid ferrite-dielectric structure comprising a combination of the ferrite toroid and the composite dielectric plate.

2. The ferrite phase shifter according to claim 1, wherein, the twin-toroid structure consists of the composite dielectric plate sandwiched between a first ferrite toroid and a second ferrite toroid.

3. The ferrite phase shifter according to claim 1, wherein, the composite dielectric plate comprises the dielectric plate with high dielectric constant sandwiched between two dielectric plates with high thermal conductivity.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a view of the twin-toroidal phase shifter of the invention;

(2) FIG. 2 is a view of the twin-toroidal ferrite-dielectric structure;

(3) FIG. 3 is a view of the twin-toroidal ferrite-dielectric structure; and

(4) FIG. 4 is a view of a composite dielectric plate.

REFERENCE NUMBERS

(5) 1. Phase Shifter 2. Waveguide 3. Twin-Toroid Ferrite-Dielectric Structure 4. Ferrite Toroid 5. Composite Dielectric Plate 6. Dielectric Plate with High Thermal Conductivity 7. Dielectric Plate with High Dielectric Constant

DETAILED DESCRIPTION OF THE EMBODIMENTS

(6) In this detailed description, the preferred structures of the high average RF power resistant ferrite phase shifter (1) of the invention are described only for a better understanding of the subject.

(7) In FIG. 1 and FIG. 2, the phase shifter (1), which provides guidance to beams in radar systems, comprises basically the waveguide (2), twin-toroid ferrite-dielectric structure (3), ferrite toroids (4), and composite dielectric plate (5) are seen.

(8) In the preferred embodiment of the invention of FIG. 1, the phase shifter (1) comprises of a combination of the waveguide (2) and the twin-toroid ferrite-dielectric structure (3).

(9) It consists of a combination of the twin-toroid ferrite-dielectric structure (3) shown in FIG. 2.

(10) The composite dielectric plate (5) shown in FIG. 3 consists of a combination of a dielectric plate with high thermal conductivity (6) and a dielectric plate with high dielectric constant (7).

(11) In the preferred embodiment of the invention, a high RF magnetic field must be created on the ferrite toroids (4) to reduce the size of the phase shifter (1) and to reduce its loss. Therefore, the dielectric constant of the dielectric plate used must be high, such as the dielectric plate with high dielectric constant (7). When the dielectric plate with high thermal conductivity (6) and a dielectric plate with high dielectric constant (7) forming the composite dielectric plate (5) are combined, the effective dielectric constant and the effective thermal conductivity of this composite dielectric plate (5) are high. In this way, the phase shifter (1) can be realized in smaller size and operated under higher power.

(12) Operating Principle of the Invention;

(13) The use of the composite dielectric plate (5) formed by combining the dielectric plate with high dielectric constant (7) and dielectric plate with the high thermal conductivity (6) is to ensure that the heat generated on the ferrite toroids (4) is carried to the waveguide (2). In this way, the temperature increase in the center of the ferrite toroid (4) is prevented.

(14) In the center of the composite dielectric plate (5), a dielectric plate with high dielectric constant (7) directs the electric field to increase the amount of phase shift obtained per the unit length. This enables the realization of a compact and low-loss phase shift (1) circuit.