Many customers will question SAGE Millimeter’s waveguide to coax adapter return loss performance. They will mention that their measured return loss is lower than what is on the provided datasheets or in the specifications provided in their quotes. SAGE Millimeter has noticed that these same customers often test return loss by using the “back to … Continue reading Why is There a 6 dB Correction on Measured Waveguide to Coax Adapter Return Loss Using a Back to Back Connection?

# Tag: Testing

# How to Use the Spectrum Analyzer and a Noise Source to Measure Noise Figure

Noise figure is an important parameter in many RF applications. Per its definition, Noise Figure (NF) is a measurement of the degradation of the signal-to-noise ratio (SNR) which is caused by components in a signal path. It is a number by which the performance of an amplifier or a radio receiver can be specified. The lower the values, the … Continue reading How to Use the Spectrum Analyzer and a Noise Source to Measure Noise Figure

# Noise Source Basics and SAGE Millimeter’s Full Band Noise Source Calibration Uncertainty

STZ series full waveguide band noise sources are silicon IMPATT diode based solid state noise sources. These noise sources implement high performance diode and propriety circuit design to offer high ENR with extreme flatness in entire waveguide bandwidth in the frequency range of 26.5 to 170 GHz in eight waveguide bands. The standard noise sources … Continue reading Noise Source Basics and SAGE Millimeter’s Full Band Noise Source Calibration Uncertainty

# Doppler Radar Target Simulators

SAGE Millimeter offers Doppler Radar Target Simulators for Radar manufacturers and developers to test and evaluate their Radar systems’ performance in an economic way by replacing expensive and time-consuming field tests. The standard models are offered to cover common radar frequency bands of 24.125 GHz, 35 GHz, 77 GHz, 79 GHz and 94 GHz with … Continue reading Doppler Radar Target Simulators

# Noise Figure of a Mixer

It is industry practice to consider the Noise Figure (NF) of a Mixer equal to its conversion loss. This is a useful approximation, and it’s generally accurate within 0.5 dB, or, at any rate, within the uncertainty of a typical noise figure measurement. Rationale Behind this Industry Practice The reason behind this approximation is that … Continue reading Noise Figure of a Mixer

# Which Harmonic Mixer Should I Use for My Spectrum Analyzer?

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?

# 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

# 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