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1. (WO2017142636) ALTERNATING ANTI-PARALLEL DIODE MIXER STRUCTURE
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CLAIMS

1. An apparatus comprising:

a first circuit in a substrate and comprising a first diode and a second diode (i) connected as anti-parallel diodes and (ii) physically adjacent to each other in said substrate; and a second circuit in said substrate and comprising a third diode and a fourth diode (i) connected as anti -parallel diodes and (ii) physically adjacent to each other in said substrate, wherein (A) said first circuit and said second circuit are (a) connected in parallel, (b) physically adjacent to each other in said substrate and (c) configured to mix two input signals to generate an output signal and (B) each neighboring physical structure in said first circuit and said second circuit that forms a diode junction is physically oriented in an opposite direction along a surface of said substrate.

2. The apparatus according to claim 1, wherein (i) said two input signals comprise a radio frequency signal and a local oscillator signal and (ii) said output signal comprises an intermediate frequency signal.

3. The apparatus according to claim 1, wherein said output signal has a lower frequency than both of said two input signals.

4. The apparatus according to claim 1, wherein (i) said two input signals comprise an intermediate frequency signal and a local oscillator signal and (ii) said output signal comprises a radio frequency signal.

5. The apparatus according to claim 1, wherein said output signal has a higher frequency than both of said two input signals.

6. The apparatus according to claim 1, wherein a common spacing exists from said first diode to said second diode, from said second diode.

7. The apparatus according to claim 1, wherein a first cathode of said first diode is connected to a second anode of said second diode and a first anode of said first diode connected to a second cathode of said second diode.

8. The apparatus according to claim 7, wherein a third cathode of said third diode is connected to a fourth anode of said fourth diode and a third anode of said third diode is connected to a fourth cathode of said fourth diode.

9. The apparatus according to claim 1, wherein (i) said first circuit and said second circuit are part of a sub-harmonic mixer and (ii) said output signal (OUT) is related to said two input signals (INI and IN2 ) in a down-conversion mode as

OUT = 2xNxINl ± MxIN2,

where N and M are harmonic integers .

10. The apparatus according to claim 1, wherein (i) said first circuit and said second circuit are part of a sub-harmonic mixer and (ii) said output signal (OUT) is related to said two input signals (INI and IN2 ) in an up-conversion mode as

OUT = 2xNxINl + MxIN2,

where N and M are harmonic integers .

11. The apparatus according to claim 1, further comprising a band-pass filter configured to filter a first input signal of said two input signals.

12. The apparatus according to claim 11, further comprising a high-pass filter configured to filter a second input signal of said two input signals.

13. The apparatus according to claim 12, further comprising a low-pass filter configured to filter said output signal.

14. The apparatus according to claim 11, further comprising a low-pass filter configured to filter a second input signal of said two input signals.

15. The apparatus according to claim 14, further comprising a high-pass filter configured to filter said output signal.