Broadband mixer circuit and method

Details Broadband mixer circuit and method Broadband mixer circuit and method

1991-11-04

1994-08-16

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455326, 333118, H04B 126

Patent

active

053394623

ABSTRACT:
A signal mixing apparatus comprising first and second four port signal splitting/combining networks having no relative phase shift between three ports and 180.degree. of phase shift between the remaining ports, coupled to a four port mixer element. The mixer element has two ports coupled to the first signal splitter/combiner network and having another two ports coupled to the second splitter/combiner, RF and LO signals input to the first splitter/combiner do not appear at the IF output from the second splitter/combiner or vice versa. The RF/IF signals cancel and the LO signal is trapped by a resonant circuit within the mixer. The RF and IF frequency bands may overlap.

REFERENCES:
patent: 3681697 (1972-08-01), Moroney
patent: 3831097 (1974-08-01), Neuj
patent: 4864644 (1989-09-01), Takahashi et al.
patent: 5006811 (1991-04-01), Kruger
patent: 5023576 (1991-06-01), Staudinger et al.
patent: 5045821 (1991-09-01), Staudinger et al.
Hallford, Ben R., "Trace Phase statest check Mixer Designs", Microwaves, Jun. 1989, p. 53t.

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