GS-BT2416C1H データシートの表示（PDF） - STMicroelectronics

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GS-BT2416C1H

Bluetooth® class 1 module with embedded HCI FW

STMicroelectronics 

GS-BT2416C1.H

Application information

6.1

Antenna reference

RF output pin must be connected to an antenna which could be:

● Antenna directly printed on the pcb (Figure 3.)

● Integrated antenna as, for example, antenova® 30-30-A5839-01, Murata

ANCV12G44SAA127, pulse W3008, Yageo CAN4311153002451K. (Figure 4.)

● External antenna connected by means a SMA connector (Figure 5.)

Figure 3. Antenna on PCB

Figure 4. Antenna examples Figure 5. SMA connector for

external antenna

uct(s) ● Despite of the type of antenna chosen, the connection between the RF out pin and the

rod antenna must be executed in such a way that the connection trace must be matched to

have characteristic impedance (Z0) of 50 Ω to get the maximum power transfer.

P ● Matching for 50 Ω is depending on the various factors, elements to be taken into

te consideration are:

le – Type of material, i.e. FR4

so – The electrical characteristics of the material, i.e. the εr, electric constant at

b 2.4 GHz

O – Mechanical dimensions of the PCB and traces, i.e. PCB thickness, trace/

- reference ground thickness, trace width, trace thickness.

t(s) – Just to give an example, using a 1 mm thick FR4 board, with an εr = 4.3 at

2.4 GHz, with Cu thickness of 41 µm, the resulted width of 50 Ω strip-line is

c 1.9 mm (Microstrip type calculation).

rodu Figure 6. Parameters for trace matching

te P Trace width

Trace thickness

bsole PCB

O ε thickness

r (Dielectric constant)

Reference ground

Tools for calculating the characteristic impedance, based on the physical and mechanical

characteristics of the PCB, can be easily found on the web.

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