Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1982-09-20
1984-07-17
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
307425, 330 49, 332 751, 455330, 455619, H04B 126
Patent
active
044610394
ABSTRACT:
A biconical antenna, the halves of which are connected together at the apex by a pair anti-parallel diodes through a pair of parallel conductive whiskers or wires. A pair of quasi-optical lenses focuses energy from a local oscillator and from a submillimeter radio source, respectively, onto the diode pair in the end-fire and broadside direction, respectively. The diode pair spacing is equal to the half wavelength of the local oscillator energy. The local oscillator energy is common mode rejected and causes the incoming radio energy to be sampled by forward biasing the anti-parallel diode pair in synchronism with each zero crossing of the local oscillator energy. Accordingly, the local oscillator energy and noise virtually do not affect the current flow between the halves of the biconical antenna. The current flow represents an intermediate frequency signal corresponding to the difference in frequency between the incoming radio signal frequency and the local oscillator frequency. Thus, local oscillator energy is mixed with incoming radio energy without permitting local oscillator noise to degrade the resulting mixed signal.
REFERENCES:
patent: 4229828 (1980-10-01), Baird et al.
Microwave Journal-vol. 23, No. 5 pp. 55-62, "New Trends in Millimeter Wave Mixer Technology" Paul et al., May 1980.
Microwave Systems News-vol. 9, No. 5, pp. 58-60, May 1979-"Quasi-Optical Mixer Offers Alternative"-Swanberg et al.
Electronic Design-vol. 23-Nov. 1977, pp. 26, 27-"Radio Receiver Reaches 670 GHZ with `Quasioptics` and New Mixer Mount"-D. Hackmeister.
Society of Photo-Optical Instrumentation Engineers-vol. 105, pp. 40-43-"Receiver Design Principles"-Gustincic, 1977.
Anderson C. L.
Benman, Jr. W. J.
Bookbinder Marc E.
Hughes Aircraft Company
Karambelas A. W.
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