PCB Antenna: Design, Prototyping & Manufacturing

Compare a printed trace, separate FPC, chip antenna and external antenna using usable clearance, installation position, required coverage and production assembly. A lower component count is useful only if the final product meets its wireless target. Reserve a matching footprint and accessible measurement point before layout is frozen.

Design output: Required band and antenna topology. Record the decision and the open questions before sending the fabrication package.

Identify the radiating copper separately from the feed line and from ground keep-outs. Specify laminate grade, dielectric spacing, finished copper, solder mask, surface finish and any restricted geometry changes. A 50-ohm feed does not mean that the radiator itself is a 50-ohm transmission line.

Build output: Board / ground outline and keep-outs; Laminate, copper and permitted geometry changes. Keep those requirements in the drawing and RF review record.

Define the test band, reference plane and required return-loss limit, then measure radiation efficiency, realized gain or the application-level behavior that matters. Repeat measurements with the enclosure, battery and cables installed. A good input match alone cannot prove useful radiated power.

Acceptance output: Enclosure and agreed RF test scope. Agree the method, sample state and evidence required before ordering.