Displaying posts in the categoryRF and Wireless
RF and Wireless articles
Semiconductor Manufacturing
Gallium nitride (GaN) is a wide-bandgap III-V compound semiconductor with a bandgap of about 3.4 eV, three times that of silicon. That wide bandgap gives it a breakdown field roughly ten times higher than silicon, and its AlGaN/GaN heterostructure forms a fast, high-density electron channel without doping. Together these let GaN transistors switch faster, at higher voltage and with lower losses than silicon in chargers, power supplies and RF amp…
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Murugavel Ganesan
July 01, 2025
Tutorials
Gallium arsenide (GaAs) is a III-V compound semiconductor made from gallium and arsenic. It matters because it does two things silicon does poorly: its electrons move about six times faster, which suits radio-frequency amplifiers and switches, and its direct bandgap lets it emit light efficiently, which suits LEDs, lasers and high-efficiency solar cells. Silicon still wins on cost, wafer size and integration density, so GaAs lives in the parts…
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Murugavel Ganesan
June 24, 2025
Tutorials
The main types of IC design are digital, analog, mixed-signal, RF (radio frequency), memory and power design. They differ in the signals they handle, the transistor behaviour they rely on, the process technologies they use and the way they are verified. Digital design is largely automated and measured in logic correctness, timing and power; analog, RF and power design are hand-crafted around device physics, noise and efficiency; memory design pu…
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Murugavel Ganesan
November 14, 2023
RF and Wireless
On 23 April 2020 the US Federal Communications Commission (FCC) voted unanimously to open the 6 GHz band, 5.925 to 7.125 GHz, for unlicensed use. That added 1,200 MHz of spectrum for Wi-Fi, more than doubling what Wi-Fi had in the 2.4 GHz and 5 GHz bands combined, and created the room that Wi-Fi 6E devices were designed to use. Devices with the new antennas and chipsets were expected to start arriving later in 2020. Key takeaways The FCC o…
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Murugavel Ganesan
April 28, 2020
Tutorials
GSM, GPRS, EDGE, UMTS, HSPA, LTE and WiMAX are successive generations of mobile radio standards. GSM (2G) carried digital voice and slow circuit data; GPRS (2.5G) and EDGE (2.75G) added packet data on the same GSM carriers; UMTS (3G) moved to wideband CDMA and HSPA pushed it to tens of megabits per second; LTE and WiMAX (4G) switched to OFDM and wider channels. 5G NR, the current generation, builds on the LTE toolkit with much wider channels, ne…
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Murugavel Ganesan
October 28, 2013
Tutorials
3G and 4G Wireless Blog: Quick Introduction to LTE-Advanced is an article written by Zahid Ghadialy where he explains LTE-A without going in technical details. This also includes the state of market on who is doing what.
Tutorials
Topics Covered: 1.What is LTE QoS? 2.QoS Tags 3.Bearer 4.QoS Management 5.PCRF Lecturered by: Yair Shapira
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Murugavel Ganesan
January 20, 2013
Tutorials
The worldwide communication technology thirst and demands in bringing digital information to widespread end users have pushed innovation to extremes. Each successive generation of cellular technology has been based on a new enabling technology. By new, i mean the availability of an existing technology at low cost, or, for handset designers, the availability of a technology sufficiently power efficient to be used in a portable device. Too of…
