SINGLE-TRANSDUCER COUPLER FOR DIAGNOSTIC PULSED DOPPLER OR PULSE-ECHO ULTRASONIC INSTRUMENTATION

Authors
  1. Kisman, K.E.
  2. Eatock, B.C.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
When a single-transducer probe is used in diagnostic pulsed Doppler or pulse-echo ultrasonic instrumentation, the coupling of the transmitter, transducer and receiver is a major problem. The receiver must be protected from large bursts of radio frequency (rf) energy from the transmitter and yet amplify small signals from the transducer, the losses in the rf bursts and the resulting signals must be small, and impedance matching must be maintained. To solve this problem, a coupler has been developed employing transmission line properties and PIN diode gates. The coupler performance has been measured at 2.0, 5.3 and 10.0 MHz. Transmit and receive losses are less than 0.9 dB. The receiver is protected from transmitter bursts by at least 147 dB.
Report Number
PUB-77-X-20 —
Date of publication
01 Jan 1978
Number of Pages
8
Reprinted from
IPC Science and Technology Press Ltd (UK), 1978, p 227-234
DSTKIM No
78-01806
CANDIS No
82499
Format(s):
Hardcopy;Originator's fiche received by DSIS

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