So for 5G in order to get new frequency bands that are wide in bandwidth, which means high data rates and low delay, you needed to look above 3 GHz. 3G was primarily about 1-GHz frequencies 4G was about 2-GHz frequencies, and as you look at 5G where you want to have very, very fast data rates and very, very short delays, you need wide bandwidths, and the frequencies below 3 GHz are now full. The interesting aspect of 5G is that it is a new set of frequency bands that are at a much higher frequency.
XBAR FILTER BLUETOOTH
So, for instance, an iPhone 12, I think had something like five antennas – one was for Wi-Fi Bluetooth and GPS and the other four were all for cellular. Each antenna needs a whole new set of RF components which means a whole new set of filters. And because everything is about bandwidth you also need to aggregate multiple bands, so that’s why a smartphone has many antennas. You can’t tune filters, therefore, every different frequency band in a phone needs a filter. A typical smartphone, such as an iPhone 12 or 11, will have somewhere in the order of 60 to 80 filters. Mike Eddy: Filters are used in many different devices but in particular in smartphones where you need to manage multiple frequency bands. Here is an excerpt from the discussion.Įlectronic Products: Where are filters used? Resonant provides design simulations, based on surface acoustic wave (SAW) and temperature compensated SAW (TC-SAW) technologies, to its customers which they manufacture in their fabs or at one of Resonant’s foundry partners.Įlectronic Products spoke with Resonant’s Mike Eddy, vice president of corporate development, about RF filters as an enabling technology for 5G. It allows the Resonant design team to identify causes of spurs, optimize isolation, minimize insertion loss, manage bandwidth, and center frequency, which are critical requirements for high-performance 5G, Wi-Fi, and Ultra-wideband (UWB) filters.
XBAR FILTER SOFTWARE
WaveX encompasses a a suite of proprietary algorithms, software design tools, and network synthesis techniques.
The company recently upgraded to the new WaveX design platform, introduced in June, which offers 3D FEM simulation capability to design RF filters, leveraging a hybrid multi-cloud, large-memory GPU-powered implementation. The company developed its XBAR RF filter technology, which meets the bandwidth requirements for 5G and Wi-Fi 6 and 6e applications, using its legacy finite element modeling (FEM) software platform, called Infinite Synthesized Networks (ISN). One of those innovation companies is Resonant Inc., a provider of RF filter solutions based on its intellectual property (IP) software platform. These range from cost issues for infrastructure and equipment to the innovation of enabling technologies, including RF filters and solutions, sensors, timing devices, and semiconductors. The 3rd, 5th, 7th, and 9th harmonics were observed, up to 38 GHz, and are also promising for high frequency filter design.Before mobile operators and OEMs can leverage the potential of 5G’s advantages in data speed, ultra-low latency, and greater capacity, they need to overcome several challenges. XBARs can be produced using standard optical photolithography and MEMS processes. This device opens the possibility for the development of low-loss, wide band, RF filters in the 3-6 GHz range for 4th and 5th generation (4G/5G) mobile phones. The static capacitance of the devices, corresponds to the imaginary part of the impedance similar to 100 omega. Measurements of the first fabricated devices show a resonance Q-factor similar to 300, strong piezoelectric coupling similar to 25%, (indicated by the large Resonance-antiResonance frequency spacing, similar to 11%) and an impedance at resonance of a few ohms. Simulations show quality-factors (Q) at resonance and anti-resonance higher than 1000. The resonance frequency of similar to 4800 MHz is determined mainly by the platelet thickness and only weakly depends on the electrode width and the pitch. In a free-standing 400-nm-thick platelet of crystalline ZY-LiNbO3, narrow electrodes (500 nm) placed periodically with a pitch of a few microns can eXcite standing shear-wave bulk acoustic resonances (XBARs), by utilising lateral electric fields oriented parallel to the crystalline Y-axis and parallel to the plane of the platelet.
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