-
- News
- Books
Featured Books
- smt007 Magazine
Latest Issues
Current IssueComing to Terms With AI
In this issue, we examine the profound effect artificial intelligence and machine learning are having on manufacturing and business processes. We follow technology, innovation, and money as automation becomes the new key indicator of growth in our industry.
Box Build
One trend is to add box build and final assembly to your product offering. In this issue, we explore the opportunities and risks of adding system assembly to your service portfolio.
IPC APEX EXPO 2024 Pre-show
This month’s issue devotes its pages to a comprehensive preview of the IPC APEX EXPO 2024 event. Whether your role is technical or business, if you're new-to-the-industry or seasoned veteran, you'll find value throughout this program.
- Articles
- Columns
Search Console
- Links
- Events
||| MENU - smt007 Magazine
SemiGen Releases New Blog on Lange Couplers
March 8, 2019 | SemiGenEstimated reading time: Less than a minute
SemiGen, Inc., an ISO and ITAR registered provider of RF and microwave contract assembly, foundry services, semiconductor devices, and RF supplies, has released a new blog detailing the development of the Lange Coupler by Dr. Julius Lange of Texas Instruments in 1969, while his group was engineering microwave amplifiers on thin film ceramic substrates. The team employed a Bell Labs approach that used 3 dB quadrature couplers, but initially struggled to find the ideal combination of low loss and wide bandwidth.
Coupled line connectors could not achieve coupling factors of 3 or 6 dB, as they were too loose. Conversely, the transistors between the interdigitated base and emitter fingers were packed too tightly. Through necessity, invention arose: Lange recalled that geometric symmetry could guarantee the 90° split between outputs known as quadrature. By only moving a portion of the crossovers to the middle, he achieved the desired loss and bandwidth targets.
Suggested Items
It’s Only Common Sense: Would You Join Your Own Company?
05/06/2024 | Dan Beaulieu -- Column: It's Only Common SenseIn the past few years, I have heard many company runners complaining about their workforce. They tell me that the government is paying people too much money not to work, too many young people are not interested in working every day, and there is just not the work ethic there once was when they were young.
Warm Windows and Streamlined Skin Patches – IDTechEx Explores Flexible and Printed Electronics
04/26/2024 | IDTechExFlexible and printed electronics can be integrated into cars and homes to create modern aesthetics that are beneficial and easy to use. From luminous car controls to food labels that communicate the quality of food, the uses of this technology are endless and can upgrade many areas of everyday life.
Scientists Propose a New Way to Search for Dark Matter
04/02/2024 | SLAC National Accelerator LaboratoryEver since its discovery, dark matter has remained invisible to scientists, despite the launch of multiple ultra-sensitive particle detector experiments around the world over several decades.
Walmart Acquires Vizio, Set to Overtake Samsung as the Largest TV Brand in the US
02/22/2024 | TrendForceUS retail giant Walmart announced on February 20, that it has acquired smart TV brand Vizio for US$2.3 billion, aiming to accelerate the growth of its advertising business: Walmart Connect. Since its launch in 2021, Walmart Connect has seen double-digit annual growth in both its online and offline retail media advertising ventures. Vizio has been expanding its device ecosystem and its SmartCast TV OS, boasting over 18 million active users, according to TrendForce.
Fiber Optic Cables Effective Way to Detect Tsunamis
02/16/2024 | University of MichiganFiber optic cables that line ocean floors could provide a less expensive, more comprehensive alternative to the current buoys that act as early warning systems for tsunamis, says a University of Michigan researcher.