Historically, limited CW power was available in the millimeterwave frequency range, especially in the higher frequency bands, Ka-band and above. Therefore, power handling was not a major concern for most customers, except in the case of certain dedicated high-power applications or programs in which special attention was required. As semiconductor advancement and applications of such … Continue reading Power Handling of Waveguide Power Combiner, Directional Coupler, Crossguide Coupler and Waveguide to Coax Adapter
Waveguides are some of the most important transmission lines used in microwave applications, especially in millimeter-wave systems, due to its low loss and high-power handling characteristics. However, the waveguide has a defined operating bandwidth due to its inherent structural limitations. For example, the standard operating frequency of a WR-10 rectangular waveguide is 75 to 110 … Continue reading Many SAGE Millimeter Products have Wider than Standard Waveguide Operating Frequency Range
The waveguide, along with the coaxial line, is one of the most important transmission media in any modern RF, microwave and millimeter-wave component, and sub-assembly and system. Due to its metal tubing configuration, the waveguide tends to be heavy and bulky, especially in low microwave frequencies. However, it is always a preferred transmission means …
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?
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
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
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?
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.
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
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?