Filters are some of the most common components found in wireless system designs. They are typically used to block interference from various sources. As limited spectrum resources are allocated to ever increasing number of users, more conflicts between these users arise and more filters are constantly needed. Nowadays, interference is quite common between cellular base stations, … [Read more...]
Review of MIL-STD 704 Requirements
IntroductionThis article discusses the power quality test and evaluation with a review of MIL-STD-704 and the relationship with electromagnetic compatibility (EMC). MIL-STD-704 deals with aircraft electric power characteristics, and provides the standard to ensure compatibility between the aircraft power system (including external power) and the utilization … [Read more...]
MIL-STD-461 CS101 Test Method Review
MIL-STD-461 CS101 Test Method Review Authored By: Soydan Cakir, TUBITAK UME, [email protected] Steve Ferguson, Compliance Direction LLC, [email protected] Osman Sen, TUBITAK UME, [email protected] Murat Celep, TUBITAK UME, [email protected] Introduction Discussions with various members of the electromagnetic compatibility (EMC) … [Read more...]
Cable Discharge Event (CDE)
AbstractWorst-case Cable Discharge Events (CDE) are poorly understood by most of the product developers as the definition of what is about to happen when you plug in a cable into an appliance’s socket. It is NOT the electro-static charge which could be expected on the cable: outer/inner shield(s) + internal wires, while the cable is fully floating prior to the cable … [Read more...]
Conformal Conductive Coating and EMI Shielding
This is a diverse and promising space. In one manifestation, spray-on inks are targeting package-level EMI shielding. Here, they hope to displace sputtering, the incumbent, which benefits from sunk CapEx and lower material consumption costs. They offer low CapEx production in atmospheric conditions and better conformal coverage. Others are developing inkjet printing solutions, … [Read more...]
Review of MIL-STD-464 Requirements
IntroductionMy reviews have covered MIL-STD-461 over the past few months so it’s time to step up to the system requirements. We realize that the MIL-STD-461 requirements apply to equipment items and subsystems as stated in MIL-STD-464. Revision “C” is the current edition, but a review is a little overdue. In this review, the discussion will focus on the various requirements … [Read more...]
Specifying RF/Microwave Power Amplifiers for EMC Testing – Final Factors to Consider
This is the final installment of AR’s blog series “Specifying RF/Microwave Power Amplifiers for EMC Testing.” The full series can be viewed here.TRANSISTORThe transistors used in the amplifier are a main component of the amplifier and can provide hints about the design and provide you with another data point in your purchasing decision. Some manufacturers have been … [Read more...]
Do Not Miss the EMC + SIPI 2019 Symposium!
In a few weeks, we will be able to enjoy the 2019 IEEE International Symposium on EMC, Signal and Power Integrity (EMC+SIPI). I am so excited!This symposium is sponsored by the IEEE EMC Society (EMC-S), the world's largest organization dedicated to the development and distribution of information, tools and techniques for reducing electromagnetic interference with support … [Read more...]
Review of MIL-STD-461 General Requirements
IntroductionRecently I noted that my series on MIL-STD-461 test methods was closing since I had accomplished a review on each of the test methods. It seems appropriate to continue with a review of General Requirements – those things common to the various test methods.These requirements have been around since the first release of MIL-STD-461 and MIL-STD-462 dealing with … [Read more...]
Specifying RF/Microwave Power Amplifiers for EMC Testing – Amplifier Control
This is post 4 of AR’s blog series “Specifying RF/Microwave Power Amplifiers for EMC Testing.” The full series can be viewed here.EMBEDDED AMPLIFIER CONTROLFor years, amplifier control has been limited to manual operation and remote control through a communications bus. With ever-changing technology, a third type of amplifier control has emerged. Now, many amplifiers … [Read more...]
