SAGE Millimeter offers harmonic mixers in two product families: SFH and STH. Their purpose is to extend the operation frequency of the spectrum analyzer and/or the frequency counter to millimeter-wave operations. These cover seven waveguide bands spanning across the frequency range of 26.5 to 170 GHz. The SFH series mixers are based on a balanced structure … Continue reading Which Harmonic Mixer Should I Use for My Spectrum Analyzer?

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# Dual Polarized Antennas from SAGE Millimeter, Inc.

The dual polarized antenna is widely used in the industry due to its versatile characteristics. It is well known that the dual polarized antenna can support linear, elliptical, and circular polarized waveforms. Here are several application scenarios. Receiving Mode When the antenna receives a linearly polarized vertical waveform, only the vertical port can receive it. … Continue reading Dual Polarized Antennas from SAGE Millimeter, Inc.

# SAGE Millimeter’s Compact Faraday Isolators

The Faraday isolator is constructed with a longitudinal, magnetized ferrite rod that causes a Faraday rotation of the incoming RF signal. By properly biasing the ferrite, the isolator will cause low loss signal in one direction and high loss in the reverse direction. Faraday isolators have found wide applications in microwave systems due to its … Continue reading SAGE Millimeter’s Compact Faraday Isolators

# The Basics of Coaxial Connectors

Coaxial devices are widely used in the microwave industry and are increasingly being used at millimeterwave frequencies up to 110 GHz. Because SAGE Millimeter’s products and services focus on higher microwave and millimeterwave frequencies, only miniaturized connectors will be discussed here. The following are concepts, terms and definitions that are widely used and accepted in … Continue reading The Basics of Coaxial Connectors

# Return Loss and SWR: Do They Represent the Same Thing?

Good impedance matching is required for the efficient transfer of signals between connected devices. Unfortunately a perfect match is rarely achieved. There are two common ways to express a device’s impedance mismatch: Return Loss and Standing-Wave Ratio (SWR). Both quantities describe the same phenomenon, but they have different interpretations. When a transmission line or waveguide … Continue reading Return Loss and SWR: Do They Represent the Same Thing?

# Bias Voltage Clarifications of SAGE Millimeter’s Amplifiers and Multipliers

SAGE Millimeter offers microwave and millimeterwave amplifiers and active multipliers in the frequency range of 10 MHz to 170 GHz. SAGE Millimeter’s standard amplifiers and active multipliers all have built-in regulators to protect the delicate microwave semiconductor devices. In addition, all amplifier and active multipliers have a built-in “charge pump” to generate negative bias so … Continue reading Bias Voltage Clarifications of SAGE Millimeter’s Amplifiers and Multipliers

# SAGE Millimeter’s Detectors are Square Root Small Signal Detectors

The SFD series and STD series waveguide detectors offered by SAGE Millimeter, Inc. are square root small signal detectors. What this means is, for the RF power in the range of -45 dBm to approximately +0 dBm, the detector output voltage is proportional to its incident power measure in dBm. Because of the behavior exhibited, … Continue reading SAGE Millimeter’s Detectors are Square Root Small Signal Detectors

# SAGE Millimeter’s Flexible and Twistable Waveguides

The flexible and twistable waveguides offered by SAGE Millimeter, Inc. cover the WR-42, WR-28 and WR-22 waveguide bands. While only exhibiting a fraction of performance degradation against their ridged waveguide counterparts, these flexible and twistable waveguides offer compelling flexibilities for system integrations at a comparable cost. For instance, the insertion loss of the WR-22 flexible … Continue reading SAGE Millimeter’s Flexible and Twistable Waveguides

# Extend the Keysight N8975A Noise Figure Meter to Millimeterwave

The industry widely used Keysight Noise Figure Analyzer (NFA) N8975A can provide accurate measurement of both gain and noise figure up to 26.5 GHz. SAGE Millimeter’s STG series Noise Figure and Gain Analyzer Extenders can extend the measurement up to 170 GHz while preserving the functionality and features that Keysight standard models offer. The model … Continue reading Extend the Keysight N8975A Noise Figure Meter to Millimeterwave

# SAGE Millimeter Doppler Radar Target Simulator

SAGE Millimeter offers Radar Target Simulator for Doppler Radar System Calibrations and Testing in the frequency range of 24 to 94 GHz. The simulator is based on Single Side Band (SSB) Modulation techniques. The simplified block diagram of the simulator is shown in the figure shown below. It is well known that the relationship between … Continue reading SAGE Millimeter Doppler Radar Target Simulator