Microwave integrated circuit device

• US 4,255,730 A
• Filed: 10/24/1978
• Issued: 03/10/1981
• Est. Priority Date: 10/24/1978
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kaneko, Yoichi, Sekine, Kenji
• Primary Examiner(s): Gensler, Paul L.
• Application Number:
  US05/954,118
• Time in Patent Office: 868 Days
• Field of Search: 333/33, 333/246, 333/247, 333/250, 343/5 DD, 343/18 D, 343/175, 343/180, 343/700 MS, 331/107 SL, 331/107 DP, 331/117 D, 325/24, 325/445, 325/451, 329/161, 455/81, 455/326, 455/327
• US Class Current: 333/247
• CPC Class Codes: G01S 7/032 Constructional details for solid-state radar subsystems
• CPC Class Codes: H03B 2009/126 using impact ionization avalanche transit time [IMPATT] diodes
• CPC Class Codes: H03B 9/14 and elements comprising distributed inductance and capacitance
• CPC Class Codes: H03B 9/147 the frequency being determined by a stripline resonator H03B9/141 - H03B9/143, H03B9/148 take precedence
• CPC Class Codes: H03D 7/02 by means of diodes H03D7/14 - H03D7/22 take precedence
• CPC Class Codes: H03D 9/0616 mounted in a hollow waveguide H03D9/0641 takes precedence
• CPC Class Codes: H03D 9/0633 mounted on a stripline circuit
• CPC Class Codes: H03D 9/0641 located in a hollow waveguide

Abstract

A microwave integrated circuit device for reception wherein a microwave integrated circuit substrate is mounted on a short-circuited plane of an inner surface of a waveguide, a rectangular groove is provided in the short-circuited plane, and a mixer diode is arranged astride the groove.

Claims

1. A microwave device having a rectangular waveguide having an end wall closed by a short circuit plane and a microwave integrated circuit (MIC) formed on a substrate for detecting a low frequency signal from a diode installed in the waveguide, characterized in that said substrate is mounted on the inner surface of said end wall, said diode is mounted on said substrate and connected to said microwave integrated circuit (MIC), and a groove having a rectangular opening of which a larger side is parallel with the longer wall of the rectangular waveguide and is of length at least 1/4λ

_g, wherein λ

_g is wavelength in the waveguide, said diode being mounted across the smaller dimension of said groove.

2. A microwave device according to claim 1, wherein the depth of the groove in the direction of the waveguide axis is approximately λ

g/8.