Phased array burst sampler
An active electronic steered antenna (AESA) circuit monitors bursts of a phased array that has a plurality of signal chains. Each signal chain therefore has a burst output for transmitting at least one burst. To monitor bursts, the AESA circuit has an input that is operably couplable with the burst output of at least one signal chain of the phased array. The input is configured to receive one or more bursts transmitted by the burst output(s) of the at least one signal chain. The AESA circuit also has a sample circuit operably coupled with the input and configured to sample the one or more bursts to produce one or more corresponding samples, and memory operably coupled with the sample circuit. The memory receives and stores the one or more samples. To provide access to the samples, the AESA circuit also has a memory interface.
1. An active electronic steered antenna circuit for monitoring bursts of a phased array having a plurality of signal chains, each signal chain having a burst output for transmitting at least one burst, the circuit comprising:
an input operably couplable with the burst output of at least one signal chain of the phased array, the input being configured to receive one or more bursts transmitted by the burst output(s) of the at least one signal chain;
a sample circuit operably coupled with the input, the sample circuit being configured to sample the one or more bursts to produce one or more samples;
memory operably coupled with the sample circuit, the memory receiving and storing the one or more of samples; and
a memory interface configured to provide access to the one or more samples.
2. The active electronic steered antenna circuit as defined by claim 1 further comprising a delay circuit operatively coupled with the sample circuit, the at least one burst having a period, the delay circuit being configured to select at least one sample point during a single period of each of the at least one burst, the sample circuit being configured to sample the at least one burst at the at least one sample point.
3. The active electronic steered antenna circuit as defined by claim 2 wherein the delay circuit is configured to select a plurality of sample points during a single period of each of the at least one burst.
4. The active electronic steered antenna circuit as defined by claim 3 wherein the delay circuit is configured to select at least three sample points during the single period of each of the at least one burst, the at least three sample points being aperiodically spaced apart.
5. The active electronic steered antenna circuit as defined by claim 2 further comprising a control interface operatively coupled with the delay circuit, the control interface having programmable controls to program the at least one sample point.
6. The active electronic steered antenna circuit as defined by claim 1 wherein the delay circuit comprises analog signaling to select at least one sample point.
7. The active electronic steered antenna circuit as defined by claim 1 wherein the delay circuit comprises an integrator.
8. The active electronic steered antenna circuit as defined by claim 1 wherein the input, sample circuit, memory, and memory interface are formed as a single integrated circuit.
9. The active electronic steered antenna circuit as defined by claim 1 wherein the input is operably coupled with a plurality of signal chains, the circuit further having a multiplexer to control receipt by the sample circuit of a plurality of bursts from the plurality of signal chains.
10. A method of monitoring bursts of an active electronic steered array having a plurality of signal chains, each signal chain having a burst output for transmitting at least one burst, the method comprising:
receiving one or more bursts transmitted by the burst output(s) of the at least one signal chain;
sampling the one or more bursts to produce one or more samples;
storing the one or more samples in memory; and
providing access to the one or more samples in memory.
11. The method as defined by claim 10 further comprising accessing the one or more samples in memory, and determining at least one quality of at least one burst based on at least one of the samples in memory.
12. The method as defined by claim 10 wherein the at least one burst has a period, the method further comprising selecting at least one sample point during a single period of each of the at least one burst, and sampling the at least one burst at the at least one sample point.
13. The method as defined by claim 12 further comprising selecting a plurality of sample points during a single period of one of the bursts.
14. The method as defined by claim 13 further comprising selecting at least three sample points during the single period of each of the at least one burst, the at least three sample points being aperiodically spaced apart.
15. The method as defined by claim 12 wherein selecting comprises charging a capacitor in response to a trigger, the method selecting the at least one sampling point as a function of the charging of the capacitor.
16. The method as defined by claim 12 further comprising programming, via a control interface, the location of at least one sample point.