RF circuit arrangement

Communications: directive radio wave systems and devices (e.g. – Determining distance – With frequency modulation

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Details

342122, 342175, 342200, 330 54, 330277, 330286, G01S 1332, H03F 360

Patent

active

048579351

ABSTRACT:
An input signal for a travelling wave or distributed amplifier having input and output transmission lines is supplied to one end (1) of the input line and an output signal is derived from one end (4) of the output line. Conventionally, the other end (2, 3) of each line is terminated in a respective matched load, but three ports of the amplifier may be employed. The travelling wave amplifier may be used to replace a circulator (CIRC, FIG. 2) in an FMCW radar having a single transmitting/receiving antenna (ANT) (TWAMP1, FIG. 3), to replace a directional coupler (DC) for supplying a local oscillator signal to a mixer (MXR) (TWAMP2, FIG. 4), and in combination with a mixer diode (D) to form a mixer amplifier (TWAMP3, FIG. 3), giving the possibility of the larger-scale integration of RF circuits.

REFERENCES:
patent: 4486719 (1984-12-01), Ayasli
patent: 4543535 (1985-09-01), Ayasli
patent: 4564817 (1986-01-01), Gilson et al.
patent: 4595881 (1986-06-01), Kennan
Kennan et al., "A 2-18 GHz Monolithic Distributed Amplifier Using Dual-Gate GaAs FET's";.
IEEE Trans. on MW Theory and Tech.s, (vol. MTT-32, No. 12; 12/84; p. 1693-1697).
Ayasli et al., "Capacitively Coupled Traveling Wave Power Amplifier"; IEEE Trans. on.
MW Theory and Tech.s, (vol. MTT-32, No. 12; 12/84; pp. 1704-1709).

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