Year: 2019

Review of MIL-STD-461 RE103 Antenna Spurious and Harmonic Outputs

Introduction Technology frequently embeds transmitters in a myriad of devices to support an Internet Of Things (IoT) concept from identification to condition-based actions, and this IoT approach includes defense operations. Devices may include multiple transmitters that a few years ago did not include communications of any sort. Inclusion of RF transmitters has prompted a significant […]

Review of MIL-STD 461 CS115 Impulse Excitation; CS109 Structure Current; RS105 Transient Electromagnetic Field

Introduction I realized earlier that my reviews have covered most of the MIL-STD-461 test methods in the past year, so I decided to prepare this to capture those items that have been omitted in prior articles. Since this is a series close out and the topics have little in common, I’ll take on each instead of […]

Review of MIL-STD 461 CS103 Intermodulation, CS104 Rejection of Undesired Signals and CS105 Cross-Modulation

Introduction  Rapid technology advances in the wireless communications world makes test and evaluation of Radio Frequency (RF) devices a difficult subject.  It seems that by the time a new device hits the market, it has been made obsolete by the next generation.  I recall hearing from a major electronics manufacturer CEO that 90% of sales happen within 90-days of market […]

Review of MIL-STD 461 CS117 Lightning Induced Transients, Cables and Power Leads

Lightning may produce a spectacular display when viewed, but the associated electromagnetic effects (EME) has the potential (pun intended) to severely damage electrical and electronic circuits. MIL-STD-461G added a new test method to evaluate device tolerance for induced current on equipment cables or insulation breakdown from the effects of indirect lightning. Although new to MIL-STD-461, […]

Review of MIL-STD 461 CE106 Conducted Emissions, Antenna Port

Let’s take on the challenging evaluation of detection and measurement of antenna port emissions – the unintentional emissions that creep through the device circuitry and are presented to the world through an intentional wireless connection.  We are NOT going into an in-depth study of antennas and we are NOT exploring what the unintentional signals may reveal.  A simple discussion on getting measurements without […]