Antenna Switch Module with integrated MIPI RFFE Interface

List of Figures and Tables

Application Note AN384

3

Revision 1.0, 2015-10-03

List of Figures

Figure 1

BGSF1717MN26 in TSNP-26-3.............................................................................................................5

Figure 2

BGSF1717MN26 Functional Diagram.................................................................................................6

Figure 3

BGSF1717MN26 Pin Configuration ....................................................................................................7

Figure 4

BGSF1717MN26 in mobile phone cellular frontend (typical discrete LTE-A feature set).................9

Figure 5

Layout of the application board.......................................................................................................10

Figure 6

PCB Layer stack-up ...........................................................................................................................10

Figure 7

“Half-Thru” deembedding board .....................................................................................................12

Figure 8

“Full-Thru” deembedding board......................................................................................................12

Figure 9

Application circuit BGSF1717MN26 ..................................................................................................13

Figure 10 Forward transmission from LB Antenna to TX LB port ....................................................................13

Figure 11 Forward transmission from LB Antenna to TX LB port ....................................................................14

Figure 12 Forward transmission from LB Antenna to TRX10 port...................................................................15

Figure 13 Return Loss from LB Antenna to the respective TRX LB RF port .....................................................15

Figure 14 Return Loss of LB TRX RF ports to LB Antenna ................................................................................16

Figure 15 Return Loss port TX LB RF port.........................................................................................................17

Figure 16 Return Loss of high linearity ultra low IL TRX10 RF port .................................................................17

Figure 17 Worst case Antenna to Port Isolation Low Band part......................................................................20

Figure 18 Worst case Port to Port Isolation Low Band part1 ...........................................................................20

Figure 19 Forward transmission from HB Antenna to the respective TRX HB RF port ...................................21

Figure 20 Forward transmission from HB Antenna to the respective TX HB RF port .....................................22

Figure 21 Return Loss from HB Antenna to the respective TRX HB RF port....................................................23

Figure 22 Return Loss from HB TRX RF ports to HB Antenna..........................................................................24

Figure 23 Return Loss of HB TX RF port ............................................................................................................24

Figure 24 Worst case Antenna to Port Isolation High Band part.....................................................................27

Figure 25 Worst case Port to Port Isolation High Band part1...........................................................................27

Figure 26 Block diagram of RF Switch intermodulation..................................................................................29

Figure 27 Intermodulation Measurement Test Setup......................................................................................29

Figure 28 Intermodulation measurement results for Band I...........................................................................30

Figure 29 Intermodulation measurement results for Band V..........................................................................31

Figure 30 Harmonic Generation Measurement setup......................................................................................32

Figure 31 Measurements of Harmonic power over Carrier power of Low-Band inputs to LB Antenna.........33

Figure 32 Harmonic power measurements of high linear LB input TRX10 over the Band 17 carrier.............34

Figure 33 Measurements of Harmonic power over Carrier power of High-Band inputs to HB Antenna .......35

Figure 34 Switching time measurements of the TX_LB input to the LB Antenna...........................................36

Figure 35 Switch Controller Unit Board............................................................................................................37