# US 4,394,632 A · Millimeter-wave odd harmonic frequency multiplier

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- Number: US 4,394,632 A
- Document ID: US4394632A
- Status: Granted
- Kind: A
- Application number: 06/278,815
- Filed: 1981-06-29
- Granted: 1983-07-19
- Earliest claimed: 1981-06-29
- Assignees: Honeywell Inc.
- Inventors: Chi P. Hu
- Web page: https://patentgrep.com/patent/US4394632A

## CPC

- H03B 19/18: and elements comprising distributed inductance and capacitance
- H03B: GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS (generators adapted for electrophonic musical instruments G10H; masers or lasers H01S; generation of oscillations in plasma H05H)

## Abstract

A millimeter-wave odd-harmonic frequency multiplier comprising a block member having an RF output port and an RF input port at right angles to one another with a pair of nonlinear resistance type diodes positioned at the intersection of the RF input port and the RF output port.

## Claims

### Claim 1

A millimeter-wave odd-harmonic frequency multiplier comprising:
(a) a block member of metallic material, said member having a main surface and a top surface at an angle to said main surface,
(b) a wave-guide RF output port extending from said main surface part way through said member, said port having a rectangular cross-section of constant width and with a first portion of said port adjacent to said main surfaces having a height selected in accordance with the desired frequency output of said multiplier and the remainder of said port having a height substantially reduced from that of said first portion,
(c) an RF input port extending from said top surface through said block member to connect with said remainder of said wave-guide port,
(d) low pass filter means insulatively positioned in said input port, and
(e) a pair of anti-parallel diodes positioned at the junction of said remainder of said wave-guide output port and said RF input port,
whereby said multiplier functions, upon a millimeter-wave signal of a base frequency being applied to said RF input port, to produce an output signal at said RF output port of an odd-harmonic of said base frequency.

### Claim 2 (depends on 1)

Apparatus of claim 1 further characterized by said (i) main and top surfaces and (ii) the axes of said output and input ports being respectively perpendicular to one another.

### Claim 3 (depends on 2)

Apparatus of claim 2 further characterized by a metallic flange member being attached to said block member at said main surface thereof and having an RF output port positioned in register with said RF wave-guide output port of said block member.

### Claim 4 (depends on 1)

Apparatus of claim 1 further characterized by said diodes being of the nonlinear resistance type.

### Claim 5 (depends on 4)

Apparatus of claim 4 further characterized by said diodes being of the Schottky-barrier type.

### Claim 6

A millimeter-wave frequency tripler comprising:
(a) a block member of metallic material, said member having a main surface and a top surface at an angle to said main surface,
(b) a wave-guide RF output port extending from said main surface part way through said member, said port having a rectangular cross-section of constant width and with a first portion of said port adjacent to said main surfaces having a height selected in accordance with the desired frequency output of said multiplier and the remainder of said port having a height substantially reduced from that of said first portion,
(c) an RF input port extending from said top surface through said block member to connect with said remainder of said wave-guide output port,
(d) low pass filter means insulatively positioned in said input port,
(e) a pair of anti-parallel diodes positioned at the junction of said remainder of said wave-guide output port and said RF input port, and
(f) a metallic flange member attached to said block member at said main surface thereof and having a RF output port positioned in register with said wave-guide output port of said block member,
whereby said multiplier functions, upon a millimeter-wave signal of a frequency of X being applied to said RF input port, to produce an output signal of a frequency of 3X at said RF output port of said flange member.

### Claim 7 (depends on 6)

Apparatus of claim 6 further characterized by said (i) main and top surfaces and (ii) the axes of said output and input ports being respectively perpendicular to one another.

### Claim 8 (depends on 6)

Apparatus of claim 6 further characterized by said diodes being of the nonlinear resistance type.

### Claim 9 (depends on 8)

Apparatus of claim 8 further characterized by said diodes being of the Schottky-barrier type.

### Claim 10 (depends on 9)

Apparatus of claim 9 further characterized by said multiplier including an RF input coupling means attached to said block member at the top surface thereof.

### Claim 11 (depends on 6)

Apparatus of claim 6 further characterized by said diodes being mounted on the end of a member positioned in an aperture of said block member.

### Claim 12 (depends on 8)

Apparatus of claim 8 further characterized by said diodes being oriented so as to lie in side by side transverse relationship in and to said RF output port.