PCBSync · Antenna design & PCB manufacturing

Patch Antenna PCB: Dimensions, Feed & Stack-up

Use a rectangular patch estimate to start a model, then resolve the feed, ground and installed structure.

Explore design tools Request engineering quote

Stack-up, test scope, price and schedule confirmed after file review.

Rectangular PCB sample with patterned antenna elements and feed lines. Material and RF performance require project records.

Key distinction: The rectangular-patch calculator is a first-order dimensional model; it does not calculate feed position, gain or bandwidth.

Explore the design before release

Patch Antenna PCB tools & quotation planning

Patch Antenna PCB project tools

PCBSync Engineering Tools · calculations run in your browser · no account required

Textbook first estimate for a simple rectangular microstrip patch. Enter a construction-specific Dk, not a universal brand value. Feed location, ground boundary, mask, losses and enclosure are not solved.

Design frequency (GHz)Entered design DkDielectric height H (mm)

Dimensional model and limits

W = λ0/2 × √[2/(Dk+1)]; εeff = (Dk+1)/2 + (Dk−1)/(2√[1+12H/W]); ΔL = 0.412H × [(εeff+0.3)(W/H+0.264)]/[(εeff−0.258)(W/H+0.8)]; L = λ0/(2√εeff) − 2ΔL.

Input guards: 0.1–100 GHz, Dk 2–12, H 0.05–5 mm, H/λ0 ≤0.03 and W/H ≥1. These are conservative model limits, not a performance guarantee. Full-wave simulation and measured tuning are needed for the released geometry.

Start with your design inputs

Example values are editable. Review the result and assumptions before adding a scenario to your enquiry.

Design tips and manufacturing decisions

Patch Antenna PCB: what to resolve before fabrication

Separate patch dimensions from feed design

The tool estimates width and resonant length with a simple fringing correction. Enter construction-specific Dk and dielectric height. Feed location, inset dimensions, probe inductance and matching require the chosen structure to be modeled.

Design output: Band and polarization requirement. Record the decision and the open questions before sending the fabrication package.

Treat the ground and dielectric as part of the antenna

Control substrate thickness, copper geometry and the ground boundary. A cover, adhesive or radome changes the electromagnetic environment. Material substitutions can require dimensional and matching revisions.

Build output: Exact substrate and dielectric height; Patch / feed / ground geometry. Keep those requirements in the drawing and RF review record.

Validate the polarization and radiation result

Define whether the target is linear or circular polarization and record the appropriate pattern or axial-ratio requirements. Compare simulation with measured PCB prototyping results in the final assembly. A resonant S11 dip is only one piece of evidence.

Acceptance output: Pattern, matching and enclosure tests. Agree the method, sample state and evidence required before ordering.

A clearer brief gets a clearer response

Four requirements for this enquiry

Band and polarization requirement

Exact substrate and dielectric height

Patch / feed / ground geometry

Pattern, matching and enclosure tests

Attach the current fabrication files and drawing revision. Mark open questions, permitted alternatives and requested delivery timing. For assembly, add BOM and placement files. Ask for exceptions and additional test costs to be identified in the response.

Real physical circuits

Physical PCB examples and construction details

These photographs show visible conductor patterns, pads and mechanical features. Confirm material identity, electrical performance and application qualification through approved project records.

Green RF circuit-board sample with coupled conductor patterns. Appearance does not establish measured impedance or antenna performance.

Green printed circuit with meandering copper and a coaxial feed. Physical construction example; frequency and efficiency need test records.

Answers for design and procurement

Patch Antenna PCB FAQ

Can this patch antenna pcb be sized from frequency alone?

The rectangular-patch calculator is a first-order dimensional model; it does not calculate feed position, gain or bandwidth. Use the calculator for its stated approximation and validate the actual structure.

What should I include in a patch antenna pcb quotation?

Include band and polarization requirement, exact substrate and dielectric height, patch / feed / ground geometry, pattern, matching and enclosure tests, current fabrication files, quantity and desired arrival date. Identify any assembly and testing scope separately.

Do the photographs prove antenna performance?

No. They show physical circuit construction. Frequency coverage, gain, material identity and qualification require the corresponding project and test records.

How do I request an engineering quotation?

Prepare current fabrication files, the proposed stack-up, quantity and requested delivery. Include material and inspection requirements. For controlled-impedance work, add target impedance, signal mode, controlled layers, reference planes and permitted geometry changes. Mark open questions for review. The planner is optional; you can request a quote with the information you have.

Technical references:TI AN058 antenna selection and measurement ↗Silicon Labs AN1088: board-specific inverted-F design ↗

References checked 1 October 2026. Historical sources are labeled. Calculations are planning aids. Use current interface requirements, construction-specific models and agreed test procedures for design release.

From requirements to a reviewable quotation

Discuss your Patch Antenna PCB project

Send the construction you want reviewed

If useful, add a planning result and your assumptions to the enquiry. Include the board revision, quantity, requested arrival date and open questions. Ask the quotation to identify the proposed stack-up, exceptions and inspection scope.

Need an NDA or a particular file-transfer arrangement? Contact us before sending files.

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Review your message and attachments before submitting. An enquiry does not place an order.

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Patch Antenna PCB: Dimensions, Feed & Stack-up