With the application of FBAR filters in next-generation wireless communications and wireless access products, today's wireless mobile products are more versatile, multi-band, multi-system, and multi-protocol. Integration and integration.
Today's wireless mobile products, in addition to the increasing volume and power saving requirements, are also moving toward multi-function, multi-band, multi-system, and multi-protocol integration and integration. Such as: GSM, CDMA, WCDMA and GPS, Bluetooth, WiFi, WiMAX and other different functions combined in one product. This also poses a challenge to design and mass production. Designers should consider the maturity and sustainability of the technology when choosing a solution.
The smaller and smaller the whole machine, the more and more crowded frequency resources, high-performance filters are particularly important.
With the rapid development of wireless communication and wireless access, frequency resources become more and more crowded, and the guard interval between different communication system frequency bands is getting smaller and smaller. On the one hand, this imposes more stringent requirements on the spectrum and power of the transmitting end of each system, ensuring that the transmitted signals have a high linearity and cannot increase the transmit power arbitrarily to increase the communication distance or reliability.
At the same time, the environment at the receiving end is worse, especially for smaller and smaller mobile products, the interference increases, and the improvement of receiving sensitivity and anti-interference must be enhanced. Especially in the 2.4GHz band, there are ISM, Bluetooth, WiFi, WiMAX and other protocol services. In order to ensure that each system works normally and does not affect each other, it is indispensable that each system receive front-end with high-performance filters. In this way, it can achieve low in-band insertion loss, large out-of-band attenuation, and high selectivity, and the receiver will not block the receiver channel due to the adjacent band transmitter (eg, LTE band 40, 2300-2400 MHz) (eg, WiFi, 2400-2482 MHz. ). It is worth pointing out that the ISM (Industrial, Scientific, Medical) use of wireless services for frequency applications is not subject to filing (filing), which further increases the unpredictability of interference sources.
The small size and high performance of the FBAR filter well meet the needs of handheld mobile devices.
The main indicators of the filter are: selectivity (Q value), insertion loss, temperature characteristics, and withstand power. The three main filters are: ceramic filters, SAW (SAW filter) and FABR. Table 1 compares the performance of the three filters:
Ceramic filter can withstand large power, good temperature characteristics, but low Q, large volume;
The SAW filter has low power, poor temperature characteristics and low Q value. The appropriate application frequency band is about 2GHz.
FBAR compared to SAW filter: Q is one order of magnitude higher, the operating frequency can be as high as 10GHz, and the temperature characteristics are good, and the withstand power is greater than. Low insertion loss, less heat generation, extended battery life, high ESD rating >200V.
Avago's FBAR products, the world's leading analog and mixed-signal semiconductor company, have been widely used in mobile phone filters, duplexers, RF front-ends, and PGS receiving front-end modules, fully demonstrating that its technology and mass production are already very mature. .
AVAGO FBAR products, using microcap wafer (wafer) package, small size, distribution parameters, stable performance, cost-effective, easy to install, application prospects. AVAGO ACPF-7025, 2496–2690MHz, 2W bandpass filter measures 12.5x2.5x1.15 mm, which can fully meet the requirements of mobile products such as mobile phones.
Future communications handsets, data cards, wireless access WiMAX/LTE voice communications, and WiFi/Bluetooth data communications will realize coexistence and complementary functions, exert their respective capabilities, and will not interfere with each other.
FBAR filter fully considers the application environment FBAR's excellent filtering performance combined with microcap package, 50ohm input and output termination, provides a great choice for fast design of high-performance mobile phones and mobile devices, and Anwar's high stable quality and huge productivity. , And provide customers with strong protection.
Recently, AVAGO based on FBAR technology, for the 2.4GHz band of mobile phones and mobile wireless products introduced the WiFi/Bluetooth band-pass filter - ACPF-7024, and WiMAX band-pass filter - ACPF-7025.
Today's wireless mobile products, in addition to the increasing volume and power saving requirements, are also moving toward multi-function, multi-band, multi-system, and multi-protocol integration and integration. Such as: GSM, CDMA, WCDMA and GPS, Bluetooth, WiFi, WiMAX and other different functions combined in one product. This also poses a challenge to design and mass production. Designers should consider the maturity and sustainability of the technology when choosing a solution.
The smaller and smaller the whole machine, the more and more crowded frequency resources, high-performance filters are particularly important.
With the rapid development of wireless communication and wireless access, frequency resources become more and more crowded, and the guard interval between different communication system frequency bands is getting smaller and smaller. On the one hand, this imposes more stringent requirements on the spectrum and power of the transmitting end of each system, ensuring that the transmitted signals have a high linearity and cannot increase the transmit power arbitrarily to increase the communication distance or reliability.
At the same time, the environment at the receiving end is worse, especially for smaller and smaller mobile products, the interference increases, and the improvement of receiving sensitivity and anti-interference must be enhanced. Especially in the 2.4GHz band, there are ISM, Bluetooth, WiFi, WiMAX and other protocol services. In order to ensure that each system works normally and does not affect each other, it is indispensable that each system receive front-end with high-performance filters. In this way, it can achieve low in-band insertion loss, large out-of-band attenuation, and high selectivity, and the receiver will not block the receiver channel due to the adjacent band transmitter (eg, LTE band 40, 2300-2400 MHz) (eg, WiFi, 2400-2482 MHz. ). It is worth pointing out that the ISM (Industrial, Scientific, Medical) use of wireless services for frequency applications is not subject to filing (filing), which further increases the unpredictability of interference sources.
The small size and high performance of the FBAR filter well meet the needs of handheld mobile devices.
The main indicators of the filter are: selectivity (Q value), insertion loss, temperature characteristics, and withstand power. The three main filters are: ceramic filters, SAW (SAW filter) and FABR. Table 1 compares the performance of the three filters:
Ceramic filter can withstand large power, good temperature characteristics, but low Q, large volume;
The SAW filter has low power, poor temperature characteristics and low Q value. The appropriate application frequency band is about 2GHz.
FBAR compared to SAW filter: Q is one order of magnitude higher, the operating frequency can be as high as 10GHz, and the temperature characteristics are good, and the withstand power is greater than. Low insertion loss, less heat generation, extended battery life, high ESD rating >200V.
Avago's FBAR products, the world's leading analog and mixed-signal semiconductor company, have been widely used in mobile phone filters, duplexers, RF front-ends, and PGS receiving front-end modules, fully demonstrating that its technology and mass production are already very mature. .
AVAGO FBAR products, using microcap wafer (wafer) package, small size, distribution parameters, stable performance, cost-effective, easy to install, application prospects. AVAGO ACPF-7025, 2496–2690MHz, 2W bandpass filter measures 12.5x2.5x1.15 mm, which can fully meet the requirements of mobile products such as mobile phones.
Future communications handsets, data cards, wireless access WiMAX/LTE voice communications, and WiFi/Bluetooth data communications will realize coexistence and complementary functions, exert their respective capabilities, and will not interfere with each other.
FBAR filter fully considers the application environment FBAR's excellent filtering performance combined with microcap package, 50ohm input and output termination, provides a great choice for fast design of high-performance mobile phones and mobile devices, and Anwar's high stable quality and huge productivity. , And provide customers with strong protection.
Recently, AVAGO based on FBAR technology, for the 2.4GHz band of mobile phones and mobile wireless products introduced the WiFi/Bluetooth band-pass filter - ACPF-7024, and WiMAX band-pass filter - ACPF-7025.
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