Active and Passive Microwave Components

Question 1

Answer

A double-balanced mixer uses a diode ring or active circuit to multiply two input signals — RF and local oscillator — while suppressing both at the output, producing a frequency-translated IF with high isolation and linearity.
Double-balanced mixers are used in radar downconverters, EW receivers, and satellite communications upconverters where dynamic range and spurious suppression are critical.
Triple-balanced mixers offer additional LO-to-RF isolation and are used in the most demanding wideband EW applications.

Question 2

Answer

A limiter is a protection device that clamps output power at a maximum level to prevent damage to downstream components such as low noise amplifiers during high-power input events.
Limiters are essential at the front end of radar receivers and EW systems where high-power interference or jamming can occur.
Teledyne RF and Microwave offers limiters and limiting amplifiers as part of its active component catalog.

Question 3

Answer

An isolator allows signal flow in one direction while providing high attenuation in the reverse direction, protecting transmitters from reflected power.
A circulator routes signals between multiple ports in a defined sequence, enabling transmit/receive sharing on a single antenna in radar and communications systems.
Teledyne RF and Microwave has manufactured isolators and circulators for over 40 years with full MIL-Spec performance capability.

Question 4

Answer

Bulk acoustic wave (BAW) delay devices introduce a controlled time delay into an RF signal path using the propagation velocity of acoustic waves in a piezoelectric material.
They are used in radar pulse compression, matched filter networks, and signal processing chains requiring precise time alignment.
Teledyne RF and Microwave offers BAW delay devices as part of its passive microwave component catalog.

Question 5

Answer

Yes. IQ modulators and demodulators are available for phased array beam-forming, communications modulation, and signal characterization applications.
Narrowband IQ networks are also offered for space applications requiring space-qualified signal processing.
All IQ products are built with chip and wire hybrid construction and can be upscreened to MIL-PRF-38534 Class H and K.

Question 6

Answer

Yes. Catalog components can be tuned for specific insertion loss targets, power handling, frequency range, and package configuration.
Custom assemblies integrating multiple passive and active functions — such as switched filter banks or coupled detector assemblies — are also available.
A dedicated engineering team supports custom requirements from specification through qualification.

Question 7

Answer

Teledyne RF and Microwave holds MIL-PRF-38534 Class H and K with TRB Option, ISO 9001, and AS9100C certification.
Products are screened to MIL-STD-883 Table I as standard, with Table II full compliance available as an option.
Environmental qualification covers MIL-E-5400 (airborne) and MIL-E-16400 (shipboard) requirements.

Question 8

Answer

Active components including mixers and detectors cover frequency ranges from UHF through Ka-band depending on product type.
Isolators and circulators are available in broadband and narrowband configurations across standard microwave bands.
Phase shifters and attenuators cover a range of sub-bands consistent with the full product catalog; datasheets provide model-specific frequency coverage.

Frequently Asked Questions