Overview
Designed a Low Pass Filter, Balun, and Low Noise Amplifier in Keysight ADS using unideal component models where noise and resonance effects are accounted for at the component parameter level.
Details
Microelectronics (Autumn 2025) · High Distinction (88)
Three RF circuits designed to meet strict benchmark specifications using Keysight ADS. Unlike standard circuit design, unideal component models are used: inductors are specified by coil length, spacing, and turn count rather than inductance value. This matters at GHz frequencies where small parameter changes cascade through the entire circuit.
Low Pass Filter (2.5 GHz)
| Parameter | Target | Result |
|---|---|---|
| Centre Frequency | 2.5 GHz | 2.75 GHz - Pass |
| Insertion Loss | < 2 dB | Pass |
| Return Loss | > 10 dB | Pass |
| Fractional Bandwidth | 30–50% | 61% - Fail |
| Out-of-band rejection | > 30 dB at 2f0 | 15/18 dB - Fail |
Balun (15 GHz)
| Parameter | Target | Result |
|---|---|---|
| Centre Frequency | 15 GHz +/-10% | 54.25 GHz (target 55) - Pass |
| Amplitude Balance | +/- 0.5 dB | Pass |
| Phase Balance | +/- 3 deg | Fail |
| Insertion Loss | 3–4 dB | Pass |
| Return Loss | > 10 dB | -19.8 dB - Pass |
| FBW | > 15% | 48.18% - Pass |
Low Noise Amplifier (15 GHz)
| Parameter | Target | Result |
|---|---|---|
| Centre Frequency | 15 GHz | Pass |
| Noise Figure | < 1.2 dB | 0.890 dB - Pass |
| Transducer Power Gain | > 10 dB | 11.557 dB - Pass |
| Return Loss | > 10 dB | Pass |
| DC Power | < 0.2 W | 0.144 W - Pass |