Wide-band microwave modulator arrangements
First Claim
1. A wide-band microwave modulator arrangement for an information signal transmission system, comprising:
- a microwave carrier signal source;
means for directing microwave carrier frequency signals from said source over first and second paths;
means for adjusting the relative phase and amplitude of the microwave carrier frequency signals in said first and second paths;
balanced modulator means in one of said first and second paths;
wide-band modulation input means for applying wide-band information signals to said balanced modulator means in predetermined amplitude and phase; and
means for combining output signals from said first and second paths such as to reinsert a signal at said microwave carrier frequency into the output of said balanced modulator means.
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Accused Products
Abstract
A wide-band microwave modulator arrangement for an information transmission system, such as a video signal distribution system, in which signals from a microwave carrier signal source are split and directed over a first path comprising an attenuator and a second path comprising phase shift means and a balanced modulator, the output signals from the two paths being combined for transmission. Signals from the carrier signal source may also be directed over a third path including phase shift means and a second balanced modulator, amplified output signals from the first two paths being combined with output signals from this third path before transmission.
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Citations
5 Claims
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1. A wide-band microwave modulator arrangement for an information signal transmission system, comprising:
- a microwave carrier signal source;
means for directing microwave carrier frequency signals from said source over first and second paths;
means for adjusting the relative phase and amplitude of the microwave carrier frequency signals in said first and second paths;
balanced modulator means in one of said first and second paths;
wide-band modulation input means for applying wide-band information signals to said balanced modulator means in predetermined amplitude and phase; and
means for combining output signals from said first and second paths such as to reinsert a signal at said microwave carrier frequency into the output of said balanced modulator means. - View Dependent Claims (2, 3, 4, 5)
- a microwave carrier signal source;
Specification