User's Manual

AN-D-212 SC14CVMDECT_SFxx_DB External Antenna Design and Leveraging Modular Approval

3.0 External Antenna Design

FCC-04-165 now allows different antennas may be

certified with one module. Dialog Semiconductor B.V.

has obtained Modular Approval for theSC14CVM-

DECT_SFxx_DB Reference Design using a specific

external printed antenna. FCC-04-165 dictates that the

certification measurements must to be performed with

the highest gain antenna and any other antenna must

have a similar radiation pattern.

In case of the SC14CVMDECT_SFxx_DB certification,

this implies that an external antenna may be connected

to radio module, without requiring recertification, pro-

vided that:

• the antenna gain is not higher than 0dBi

• the antenna type is a (printed) monopole

In addition, if the antenna connection is user accessi-

ble, then the antenna connector shall be proprietary.

3.1 SC14CVMDECT_SFXX_DB ANTENNA DESIGN

The SC14CVMDECT_SFxx_DB Reference Design

includes a SC14CVMDECT SFxx module and an addi-

tional printed antenna to support FAD (e.g. to operate

as an FP).

Figure 1 SC14CVMDECT_SFxx_DB Reference

Design overiew

In Figure 1 an overview is given of the SC14CVM-

DECT_SFxx_DB Reference Design. In the middle right

section the SF module can be seen. The printed

antenna occupies the lower right part in Figure 1.

This Reference Design is an example application

design. The key part of this design, in relation to wire-

less performance and leveraging existing Modular

Approval, is the section of the printed antenna in the

lower right corner, together with its location and con-

nection with respect to the SF module, as well as the

ground plane contours. This relevant section is high-

lighted by the light green rectangle in Figure 1.

The gerber files of this design can be obtained through

your Dialog Semiconductor B.V. sales contact or repre-

sentative.