UMS Analog Attenuators DC–45GHz
Mfr. Part #：CHT3091-FAB / CHT3091a99F / CHT3091aQAG / CHT4660-FAB / CHT4660-QAG / CHT4690-99F / CHT4690-FAB / CHT4690-QAG / CHT4694-99F / CHT4694-QAG / CHT4699-QDG
Manufacturer：UMS / United Monolithic Semiconductors
Package/Case：Die, QFN, Hermetic SMD
Description：UMS analog attenuators provide RF and microwave signal-level control across frequencies from DC to 45 GHz. The portfolio offers amplitude control of up to 37 dB and includes Die, QFN and Hermetic SMD package options.These variable attenuators are suitable for gain adjustment, signal balancing and dynamic range control in radar, electronic warfare, satellite communication, telecom and RF test systems. Different models are available for broadband DC operation, 5–30 GHz microwave systems and Ka/Q-band applications.
UMS Analog Attenuator Selection
| Part Number | Description | Frequency Range | Amplitude Control | Insertion Loss | P-1dB IN | Package |
| CHT3091-FAB | Broadband Analog Attenuator | DC–14 GHz | 20.5 dB | 2.5 dB | 15 dBm | Hermetic SMD |
| CHT3091a99F | Broadband Analog Attenuator | DC–40 GHz | 17 dB | 3 dB | 15 dBm | Die |
| CHT3091aQAG | Broadband Analog Attenuator | DC–12 GHz | 20 dB | 3 dB | 15 dBm | QFN |
| CHT4660-FAB | Variable Attenuator | 0.5–16 GHz | 35 dB | 2.2 dB | 27 dBm | Hermetic SMD |
| CHT4660-QAG | Broadband Analog Attenuator | DC–16 GHz | 30 dB | 2 dB | 24 dBm | QFN |
| CHT4690-99F | Microwave Analog Attenuator | 5–30 GHz | 28 dB | 4 dB | 25 dBm | Die |
| CHT4690-FAB | Variable Attenuator | 5–30 GHz | 37 dB | 3.5 dB | 25 dBm | Hermetic SMD |
| CHT4690-QAG | Microwave Analog Attenuator | 5–30 GHz | 31 dB | 4 dB | 25 dBm | QFN |
| CHT4694-99F | Ka/Q-Band Analog Attenuator | 25–45 GHz | 24 dB | 4 dB | 22 dBm | Die |
| CHT4694-QAG | Ka-Band Analog Attenuator | 25–40 GHz | 22 dB | 4 dB | 22 dBm | QFN |
| CHT4699-QDG | Q-Band Variable Attenuator | 36–44 GHz | 30 dB | 4 dB | 20 dBm | QFN |
Frequently Asked Questions
Q1: Which UMS analog attenuator covers DC to 40 GHz?
The CHT3091a99F provides continuous DC–40 GHz operation with 17 dB amplitude control. It is supplied as a Die for integration into broadband microwave modules.
Q2: Which model provides the highest amplitude control?
The CHT4690-FAB offers the highest amplitude control in this series at 37 dB. It covers 5–30 GHz and is supplied in a Hermetic SMD package.
Q3: Which model is suitable for higher input power from 0.5 to 16 GHz?
The CHT4660-FAB supports a P-1dB input level of 27 dBm, 35 dB amplitude control and 0.5–16 GHz frequency coverage.
Q4: What is the difference between CHT4694-99F and CHT4694-QAG?
The CHT4694-99F is a Die version covering 25–45 GHz, while the CHT4694-QAG is a packaged QFN version covering 25–40 GHz.
Q5: Which UMS attenuator is designed for 36–44 GHz systems?
The CHT4699-QDG covers 36–44 GHz with 30 dB amplitude control and is supplied in a QFN package.
