New JRC has devoted to develop power amplifier multi-chip modules for transmission that use for communication equipment such as smartphones and WiFi routers. This newly developed RF power amplifier NJG1330 corresponds to the Ultra High Band used in 4G LTE-Advanced and has entered mass production.
The needs of smartphones and WiFi routers using wireless communication are increasing due to the worldwide spread. Since smartphones and WiFi routers are portable equipment, the requirement of power saving is necessary.
Combining RF analog, CMOS digital, CMOS analog circuit design technology and package technology, New JRC has developed the power amplifier modules for transmission that can reduce the power consumption of communication equipment.
New JRC has an assortment of power amplifier modules for transmission that cover various Cellular LTE bands, and has developed a series of High Band: NJG1329, Ultra High Band: NJG1330, and Middle Band: NJG1331. Ultra High Band 3.4 to 3.8GHz is the frequency band used by NTT Docomo's PREMIUM 4G *1. The operation of sXGP *2 is planning to use Middle Band 1.7 to 2.0GHz band.
PREMIUM 4G is the NTT Docomo's registered trademark.
Communication standard for data communication such as cordless phones and smart meters.
Power Added Efficiency*3 is good
Compared with conventional products，the new power amplifier can convert DC component and RF component to RF power that is supplied to the equipment with high efficiency, so it is possible to reduce the consumption of communication equipment such as smartphones and WiFi routers.
Power Added Efficiency = (Output Power − Input Power) / (Power Supply × PA Total Operating current) × 100 (%)
Low power transmission mode
Because it can be set to the operating voltage and operating current according to the transmission power of the power amplifier module for transmission, it contributes to low power consumption of the equipment.
It is possible to utilize the operating voltage control function such as APT (Average Power Tracking) and ET (Envelop Tracking) that reduce the power consumption by changing the operating voltage.
Compliant with MIPI RFFE interface specification
The NJG1329 is compliant with MIPI RFFE Ver1.1, and the NJG1330/NJG1331 is compliant with MIPI RFFE Ver2.0.
Built-in coupler for detecting transmission power (only NJG1331)
When transmitting from the terminal, it is necessary to measure the power to adjust to specified power.
Since the NJG1331 has a built-in coupler circuit for detecting the transmission power, the external coupler is unnecessary. The sXGP etc. constituted the transmission circuit by single band contributes to reducing the number of parts and the mounting area.
|Band||High Band||Ultra High Band||Middle Band|
|Frequency band||2.5 to 2.7GHz||3.4 to 3.8GHz||1.7 to 2.0GHz|
|Power added efficiency||31.5%
@Pout＝28dBm (LTE Bands 2,3,4,9,25,66,39)
|Detection circuit for transmission power||-||-||Built-in coupler circuit|
|Operating voltage control function||APT||APT/ET||APT|
|Status||In mass production||Mass production from July||Provide sample|
TDD-LTE (Time Domain Duplex − Long Term Evolution): time division duplex communication mode between base station and terminal
- Portable WiFi router
- Cellular equipment of Small Cell、CPE*5 etc. used LTE
Small Cell、CPE (Customer Premises Equipment)：a kind of base station and terminal