Tuesday, October 31, 2017 9:00:16 AM
GOLETA, CA--(Marketwired - October 31, 2017) - Resonant Inc. (NASDAQ: RESN), a designer of filters for radio frequency, or RF, front-ends that specializes in delivering designs for difficult bands and complex requirements, today announced that a licensee has produced a state-of-the-art Full-Band, Band 41 Time Division Duplex (TDD) filter that is required for all handset vendors addressing the China market, using a Resonant Surface Acoustic Wave (SAW) design. Resonant's licensee has also made this Band 41 filter available for sale and is currently sampling to OEMs.
The Band 41 TDD filter is a highly technical and complex design, widely regarded as one of the most difficult filters to design. Typically, in high frequency operation (the maximum passband frequency is 2.69GHz), these designs are restricted to small feature sizes, while the filter must handle high LTE powers because of TDD operation. In addition, this specialized design requires extremely large bandwidth at 194MHz, as well as the rejection of neighboring WiFi bands to prevent interference.
"Not only were we able to create this very complex Band 41 filter design in less than our stated time frame of 12-18 months for an ISN Pilot design, but we did it on a SAW platform, which we believe is the first of its kind in the market," said George Holmes, CEO of Resonant Inc. "We expect this to be a high-volume filter, with the potential for rapid growth due to its use in Asia for LTE. Our customers require increasing complexity and rapidly evolving technology, which Resonant has delivered in the Band 41 filter design using our innovative software, intellectual property, and the capabilities of our experienced team."
"This design is yet another example of how we are focusing on our core business and reducing execution risk as we drive towards royalty revenues," Holmes added. "We continue to collaborate with our customers to reduce the time it takes to bring our designs to market, in an effort to accelerate our receipt of royalty revenues."
The Company believes that the superior performance of Resonant's Band 41 filter design offers several key advantages over competitive filters:
. Full band operation (194MHz) - One part can accommodate all of the Band 41 carriers globally. This is a significant improvement, given that most of the commercially available filters are sub-band, while full band parts are traditionally processed in BAW and FBAR, which is much more expensive.
. WiFi co-existence filter - This filter design results in high rejection to WiFi ( > 35dB). In addition, it allows for operation of TDD cellular and WiFi simultaneously, while also reducing interference.
. Small footprint - With measurements of only 1.3 mm x 1.1 mm, the size of this design translates to less material and lower production costs, which can be passed on to customers.
. HPUE capable - High Performance User Equipment (HPUE) is designed to improve the performance of TDD-LTE Band 41 networks around the world, by allowing higher power operation and therefore improved coverage. This is a current requirement of China Mobile.
Figure 1 compares the measured passband performance of Resonant's Band 41 filter design as compared to the best publicly available Band 41 filter. Lower insertion loss (IL) represents higher performance.
The improved performance over BAW is validation of the capabilities of Resonant's ISN platform. In particular, the accuracy with which the measured performance matches the simulation prior to fabrication (see Figure 2), allows optimization of performance without the need for multiple fabrication iterations.
ref: http://www.marketwired.com/press-release/resonant-announces-availability-full-band-band-41-tdd-filter-available-as-isnr-design-nasdaq-resn-2238904.htm
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