Tunable Digital Capacitor Arrays (TDCA)
WS1050: Three Capacitors in One Chip
WS1040 Family of Tunable RF Capacitors: WS1040 WS1041 WS1042
WS1033 LTE Antenna Tuner
You are on a conference call with your most important customer when you realize that the battery indicator is heading into the red faster than your boss can possibly finish the call. You now have only one choice; find an AC outlet and plug-in before your phone shuts down and your boss think you ignore him and the customer. Starbucks could work if you were the only one with this problem but apparently you are not, everybody is plugged in. You finally find an outlet in the corner of a strip mall takeout place and end up having lunch there while your phone replenishes some very expensive electrons.
Technically, what has happened is that you are stuck in a low signal area and your cellular radio is using all the available power to keep the connection going with an underperforming antenna, possibly with your hand holding the phone adding to the problem.
So let’s step back and see what factors contribute to the above situation. Clearly there has to be a way to engineer a wireless device that people can actually use without being tied to an AC-charger!
The main contributing factors to this problem are:
• Consumer demand for “thin”
• Large “to the edge” displays
• Extended bandwidth requirements for LTE bands
• Physically large batteries
• Metal trim & bezels that reduce available antenna volume
In the past, a compromised fixed tuning solution offered a workable performance level that, with regionalization, could be sold in different markets. This was not pretty and nothing to be proud of in terms of radio performance and battery life.
With the introduction of new LTE bands extending the required frequency range down to 700 MHz and up to 2700 MHz, we have reached a point where a compromise solution is no longer technically feasible and a new technology must be applied. The solution is to make the antenna system dynamic instead of static and go from “always compromised” performance to “always optimized” performance. And there is no better way implement tunability than with WiSpry’s LTE solutions.
The unbeatable combination of single voltage operation, ultra high linearity/IP3, and highest Quality factor (Q) performance coupled with a single chip implementation in CMOS makes WiSpry LTE tuners and tunable capacitors your best solution for modern form factor LTE devices with excellent RF performance, restoring design margin while improving performance, reducing power consumption and increasing manufacturing yields.
WS1050: Three Capacitors in One Chip
The WS1050 tunable RF capacitor combines three individually controllable and configurable capacitors into a single chip. The new chip reduces cost, board space and design time while improving linear performance and design flexibility. The WS1050 delivers performance equaling a fixed passive component network, the industry’s highest Q, the widest impedance coverage and lowest loss, as well as the highest capacitance tuning range available. The linear performance of the chip offers full power LTE third harmonics as low as -150dBc which is typically 30 dB better than other solutions. Support for up to eight USIDs allows for multiple tuners per system. The WS1050 is optimally suited for antenna tuning, particularly applications including carrier aggregation.
- Mobile devices including smartphones, feature phones and tablets
- Wireless infrastructure equipment including basestations, picocells, femtocells, and WiFi routers
- Current network architectures including LTE and LTE Advanced
- Future network architectures including 600 MHz
- Measurement/Test instruments, phase shifters
- Tunable filters and amplifiers
- Tune antennas and amplifiers for signal chain gains up to 3dB
- Eliminates a separate LTE antenna
- Completely integrated solution saves board space and external component cost
- Broadband antenna tuning with an SRF above 3.5gHz
WS1040 Family of Tunable RF Capacitors
WiSpry Launches New Family of Optimized Tunable RF Quad-Capacitor Chips
At Mobile World Congress 2014, WiSpry will launch a new line of Tunable RF products optimized for applications ranging from wearables to consumer wireless devices to aperture tuning. Each device is one more example of WiSpry’s Tunable RF leadership and the growing industry need for flexible solutions.
WS1040 Quad Capacitor Single Chip Delivers High Performance Antenna Tuning for Wearables and Smartphones
The WS1040 single chip delivers the highest performance and the industry’s highest Q in an ultra-compact package that is 30% smaller than WiSpry’s class-leading W1050 solution. Support for multiple USIDs and system configuration flexibility in shunt or series mode enables maximum circuit design flexibility.
This Tunable RF quad capacitor addresses numerous antenna challenges facing wearable device designers. The single chip enables real-time control and adaption to the electrical signal environment. In addition, the WS1040 allows an electrically small and physically thin antenna used in a wearable device to tune over a wide frequency range, enabling OEMs to expand their product lines into global markets. View the full PDF press release. DOWNLOAD
WS1041 Boasts Widest Range of Antenna Aperture Tuning Performance
The WS1041 tunable RF quad capacitor array offers voltage handling up to 80V for aperture tuning applications requiring the highest Q and linear performance. The single chip contains four capacitors that can be configured in series or shunt, enabling RF designers to address every antenna aperture tuning circuit configuration. The four independent capacitors on-chip allow a parallel combination for higher capacitance, or a series connection for higher voltage handling.
Antenna aperture tuning applications typically require a lower total capacitance combined with highly accurate control and higher voltage handling. At the same time, aperture tuning devices used for Carrier Aggregation (CA) must not generate harmonics or lower the Q of the antenna system, as this would counter the benefits achieved by tuning. The WS1041 addresses these requirements perfectly with third harmonic as low as -150dBc, which is typically 30 dB better than other solutions, and a typical Q of 150 at low band and max capacitor setting. View the full PDF press release. DOWNLOAD
WS1042 Is the First RF Capacitor for Tunable Filters in Consumer Wireless Applications
Combining the smallest step size, highest Q and extreme voltage handling, the WS1042 tunable RF quad capacitor array is optimized for tunable filter applications. This passive, non-fixed device enables RF designers to build adaptive frequency wireless networks, leveraging the highest possible Q available. The WS1042 boasts very high linearity, enabling the chip to be used in both in receive and transmit chains. Capacitance step size is 25 fF – the smallest step size in the industry and the WS1042 can change filter center frequency in less than 20 us. Exceptionally high voltage handling as high as 100V further cements the WS1042 as an industry first.
During Mobile World Congress, WiSpry will demonstrate the new WS1042 in a tunable filter application using equipment from National Instruments. View the full PDF press release. DOWNLOAD
At the Mobile World Congress in Barcelona 2012, WiSpry launched the WS1033 LTE Antenna Tuner. The WS1033 allows engineers to select the optimum circuit configuration for their antenna tuning requirements. The WS1033 also features both a MIPI Alliance RFFE interface and a 3 / 4-wire SPI interface, which makes it plug-and-play compatible with all major smartphone chipsets.
Like every WiSpry product, CMOS integrated MEMS capacitors ensure the industry's highest RF performance, lowest energy consumption and outstanding linearity to support LTE and SVLTE applications.
WS1033 LTE Tuner Key Features
- Capacitance Range 7 or 14 pF (dual 7 pF banks)
- Super Flexible All Series Configuration
- Industry’s Highest Q-factor and IP3
- Digital Precision for Super Accurate Tuning Performance
- Single Voltage operation
- Lowest (70 uA) Power Consumption
- Super Fast Tuning Speed
- Digital Device Control over SPI & MIPI RFFE1.1
Datasheets, application notes, setup guides, simulation models and other design tools are available in the ftp section of the website. Contact WiSpry to learn more about the best option for your evaluation needs. Evaluation kits are shipping and more information on evaluation kits is available in the WS2017/WS2018 section www.wispry.com/products-TIM.php
. The evaluation kit platform is common to all WiSpry products, only the daugher-board is differnt to allow for evaluation of series and shunt configuration.