A Defective Ground Structure (DGS) is an intentionally designed defect on a ground plan, which creates additional effective inductance and capacitance. This technique can be used to design microstrip lines with desired characteristics such as higher impedance, band rejection and slow-wave characteristics, while significantly reducing the footprint of the microstrip structure. DGS structures are used [...]
Entries Tagged as 'EM'
Using EM to Design DGS Structures
February 12th, 2010 · No Comments · Application Engineer
Tags: EM·FEM·Spiral Inductor
60 GHz Low Noise Amplifier Design Methodology in CMOS 65nm by STMicroelectronics
December 17th, 2009 · No Comments · Users Group Paper
Baudouin Martineau of STMicroelectronics gives an excellent overview of the 60 GHz millimeter wave market, applications including WPAN, automotive radar and 94 GHz imaging; semiconductor technology requirements and 65nm CMOS technology specifically; modeling, parametric cells, electromagnetic simulation, Momentum modeling of vertical and horizontal coupled transformers, LNA design methodology, using circuit and EM simulation and optimization.
Millimeter-wave [...]
Tags: 60 GHz·65nm·Amplifier·cascode·CMOS·EM·Harmonic Balance·LNA·mmW·Momentum·MOSFET·radar·SOI·V-Band·WLAN·WPAN
BGA Package Simulation
September 6th, 2008 · No Comments · Application Engineer
A BGA package is very popular package style for high speed digital applications due to high density, low thermal resistance, and low inductance leads. In a BGA package, the electrical connections are made of solder balls stuck to the bottom of the package. However as the operating frequency and data rate go up, it is [...]
QFN Package Optimized for 20 GHz
September 6th, 2008 · No Comments · Application Engineer
QFN (Quad Flat No-Lead) is very popular low cost package for RFIC, MMIC, and RF SiP applications. Most IC vendors use this package for their products. QFN packages perform pretty good up to 15GHz, showing less than -18 dB return loss with a typical package mounting scheme. However new designs require a higher operating frequency [...]