Free eBook Download

Content Inside :

This document describes a demoboard for the upcoming 2.4GHz Industrial-Scientific-Medical (ISM) band for applications like wireless communication, LAN and video/TV signal transmission. It covers a power amplifier (PA) for transmitting, a low noise amplifier (LNA) for receiving and an RF switch for multiplexing these two main circuits to a third antenna terminal. This document illustrates applications information, standards, description of the board itself and a selection of the design procedure. The signal receiving occurs during the RX time slot. For this operation mode, the antenna is switched away from the PA (power amplifier) and connected to the LNA input under the control of the CNTRL-Pin. System analysis of the noise performance of a complete receiver show that a low noise amplifier (LNA) BGU2003 can improve the receiver sensitivity by reduction the effective RX system noise figure (NF). In this example the use of the LNA in front of the receiver chip-set does improve the overall receiver system noise figure to NF=2.3dB. The equations show that the first device in a cascade of objects has the most effect on the overall noise figure. In reality the first part of a receiver is the antenna. Its quality is very important. Illustrated is a principle idea how the 2.4GHz Generic Front-End demoboard can work together with a transceiver for improved performances. Up and down direct conversion I/Q transmitter for 2.4GHz with TX output power up to +20dBm and RX low noise. Digital control of all functions. Circuit Details The SPDT is build by the circuit {D1, D2, R1, C4, C3, L1, C2, C1}. It function is controlled by the circuit Q3, D6, R6, R7,C18. The PIN diode forward current is set-up by R1. C4 do short the cathode of D2 to GND. C3 couple the Antenna to the switch by removal of dc components.

Tags : low noise amplifier, system noise figure, principle idea, philips product, ism band, rf switch, power amplifier, direct conversion, circuit details, rx system, pin system, dc components, receiver sensitivity, noise performance, receiver system

If you see unrelated pdf files with the description or copyrighted material published, please report to us, we'll correct/delete it it as soon as possible.NONE OF THOSE MATERIALS ARE HOSTED IN THIS SERVER NOR UPLOADED BY ME IN SOMEONE'S SERVERS.  Read our DISCLAIMER for more detail.

We are neither affiliated with authors and brands nor responsible for its content and change of content.

Information contained herein is provided "as is" without warranty of any kind, either expressed or implied, including any warranty of merchantability or fitness for a particular purpose. In no event shall ANYONE be held liable for any loss of profit, special, incidental, consequential, or other similar claims.