Frequency-channel multiplexer and demultiplexer
AssigneeANT Nachrichtentechnik GmbH
InventorLothar Friederichs
Life of this patent
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Abstract
A circuit of low complexity which selects arbitrary channels from a plurality of multichannel input signals and generates from a plurality of individual frequency channels a plurality of output signals whose channel composition can be freely selected, consists of a plurality of bandpass filters (BP1, BP2 . . . BPn) which are tuned to the individual frequency channels and whose input and output are respectively connected to a gate of one of a plurality of circulators (Z11, Z12 . . . Z1n; Z21, Z22 . . . Z2n) connected in a chain. In this case, at least two circulator chains are present (ZK1, ZK2), and a circulator (Z11, Z12 . . . Z1n; Z21, Z22 . . . Z2n) from one of the circulator chains can be optionally switched to the input and output of each bandpass filter (BP1, BP2 . . . BPn).
Claims15
A frequency-channel multiplexer and demultiplexer arrangement, consisting of a plurality of bandpass filters which are tuned to respectively different individual frequency channels and which each have an input/output respectively connected to a gate of one of a plurality of circulators connected in a chain, wherein at least two circulator chains (ZK1, ZK2) are present, and a circulator (Z11, Z12 . . . Z1n;
- Z21, Z22 . . . Z2n) from one of the circulator chains (ZK1, ZK2) can optionally be switched to said input/output of each bandpass filter (BP1, BPn).
Frequency-channel multiplexer and demultiplexer comprising:
- a plurality of bandpass filters which are tuned, respectfully, to different individual frequency channels and which each have a first and a second input/output terminal;
- a plurality of circulator chains, each consisting of a plurality of circulators connected in series and each having a signal input/output at one end of the chain;
- and means for selectively connecting said first input/output terminal of each of said bandpass filters to a gate of a respective circulator in each of said circulator chains.
A frequency-channel multiplexer and demultiplexer arrangement, comprising:
- a plurality of bandpass filters which have different center frequencies and are tuned to different individual frequency channels, with each said bandpass filter having a first and a second input/output terminal;
- at least two circulator chains each including a respective plurality of circulators, each having first, second and third sequential gates in a direction of circulation, with the circulators of each respective chain being connected in series via the respective first and third gates;
- and means for selectively connecting the second gate of each circulator of a respective chain to the first input/output terminal of a respective bandpass filter.
Dependencies are inferred from the claim text.