UMS 20–86GHz RF Mixers | CHM1290, CHM1298, CHM1080
Mfr. Part #：
CHM1080-98F / CHM1270a98F / CHM1290-99F / CHM1291-99F / CHM1294-99F / CHM1298-99F / CHM2179b98F / CHM2378a99F / CHR2294-99F
Manufacturer：
UMS / United Monolithic Semiconductors
Product Type：
RF Mixer / Sub-Harmonic Mixer / Single-Sideband Mixer / W-Band Mixer
Package/Case：
Die
Product Description
UMS CHM and CHR series MMIC mixers cover selected RF bands from 20 to 86 GHz, including Ka-band, Q-band, V-band, E-band and 76–77 GHz W-band solutions.
The range includes LO-buffered sub-harmonic mixers, single-sideband mixers and W-band single- or dual-channel mixers. These devices support frequency conversion in point-to-point communication, broadband access, radar, automotive sensing and industrial sensor systems.
UMS RF Mixer Selection
| Part Number | Description | RF Frequency | Conversion Gain | IF Bandwidth | LO Frequency | LO Input Power | P-1dB IN | Bias | Package |
| CHM1080-98F | Self-Biased SSB Mixer | 71–86 GHz | −11 dB | DC–12 GHz | 34.5–44 GHz | 2 dBm | 10 dBm | 90 mA, 3.5 V | Die |
| CHM1270a98F | Dual-Channel Transmitter/Receiver | 76–77 GHz | −7.5 dB | DC–0.1 GHz | 76–77 GHz | 15 dBm | — | Self-biased | Die |
| CHM1290-99F | Sub-Harmonic Mixer | 20–30 GHz | −10 dB | DC–6 GHz | 10–15 GHz | −4 dBm | — | 33 mA, 4 V | Die |
| CHM1291-99F | Single-Sideband Mixer | 25–32 GHz | −11 dB | 0.1–3 GHz | 12–15.5 GHz | 5 dBm | — | 55 mA, 3.5 V | Die |
| CHM1294-99F | Self-Biased SSB Mixer | 35–45 GHz | −11 dB | DC–3 GHz | 16–24 GHz | 10 dBm | — | 60 mA, 4 V | Die |
| CHM1298-99F | Self-Biased SSB Mixer | 55–65 GHz | −12 dB | DC–5 GHz | 27.5–32.5 GHz | 10 dBm | — | 90 mA, 3.5 V | Die |
| CHM2179b98F | Single-Channel W-Band Mixer | 76–77 GHz | −8 dB | DC–0.1 GHz | 76–77 GHz | 5.5 dBm | — | 1 mA, 4.5 V | Die |
| CHM2378a99F | Dual-Channel W-Band Mixer | 76–77 GHz | −7.5 dB | DC–0.1 GHz | 76–77 GHz | 7 dBm | — | 1.5 mA, 4.5 V | Die |
| CHR2294-99F | Self-Biased SSB Mixer | 25–35 GHz | −11 dB | DC–3 GHz | 11–19 GHz | 9 dBm | 2.5 dBm | 55 mA, 4 V | Die |
Product Selection
For 20–35 GHz communication and Ka-band conversion stages, the main options are CHM1290-99F, CHM1291-99F and CHR2294-99F.
The CHM1294-99F targets 35–45 GHz systems, while the CHM1298-99F covers V-band applications. The CHM1080-98F provides wide 71–86 GHz coverage for E-band radio and high-capacity backhaul equipment.
For 76–77 GHz radar and sensing systems, CHM2179b98F provides a single mixer channel, while CHM2378a99F and CHM1270a98F provide dual-channel architectures.
Typical Applications
Ka-, Q-, V-, E- and W-band RF modules
Up-conversion and down-conversion
Point-to-point microwave communication
E-band wireless backhaul
76–77 GHz automotive radar
Industrial radar and sensor systems
Frequently Asked Questions
Q1: Which UMS mixer covers 71–86 GHz?
The CHM1080-98F covers 71–86 GHz and integrates a sub-harmonic mixer with an LO buffer. It can be used for both up-conversion and down-conversion.
Q2: What is the difference between CHM1290-99F and CHM1291-99F?
The CHM1290-99F is a 20–30 GHz sub-harmonic mixer, while the CHM1291-99F is a 25–32 GHz single-sideband mixer with image-rejection capability.
Q3: Which model is suitable for 55–65 GHz V-band systems?
The CHM1298-99F is the dedicated 55–65 GHz self-biased single-sideband mixer. It integrates an LO buffer and supports up- and down-conversion.
Q4: Which mixers are designed for 76–77 GHz radar?
The CHM2179b98F, CHM2378a99F and CHM1270a98F all operate at 76–77 GHz. They are intended for applications such as automotive long-range radar and industrial sensors.
Q5: Is CHM2378a99F a 4W power transistor?
No. The current UMS webpage heading appears to contain an inconsistent description. The product text and official selection guide identify CHM2378a99F as a 76–77 GHz dual-channel mixer, not a power transistor.
