Patch antenna category guide
Patch Antennas for GPS, GNSS and Compact Wireless Devices
Use this pillar page to compare patch antenna types, selection factors, applications, and related Rftech product pages. It is built for engineers and sourcing teams who need a practical path from antenna concept to sample discussion.
Selection factors
Compare the real constraints
Frequency band, polarization, patch size, ground plane, and active/passive architecture decide whether a patch antenna fits the final device.
Application paths
Move from use case to product
Open the matching GPS/GNSS, RHCP, application, or manufacturer page instead of searching through unrelated products.
Engineering resources
Use the topic library
Design, gain, bandwidth, radiation pattern, and selection guides are grouped below for deeper technical review.
Choose the right path first
Reference product category pages put selection paths close to the top. This page follows the same engineering-first pattern: choose the requirement, then open the most relevant product, application, or RFQ page.
Product path
GPS / GNSS patch antennas
Compare ceramic patch options for embedded positioning receivers, trackers, timing hardware, and GNSS modules.
Technical path
RHCP patch antenna selection
Review polarization, axial ratio, multipath rejection, and phase-center considerations for GNSS reception.
Application path
Patch antenna applications
Map use cases across asset tracking, telematics, RTK receivers, timing, and compact modules.
Commercial path
Manufacturer and OEM support
Prepare custom size, cable, connector, housing, documentation, and sample requirements for sourcing.
What is a patch antenna?
A patch antenna is a low-profile antenna built around a radiating patch, dielectric material, and ground plane. In GPS and GNSS devices, ceramic patch antennas are widely used because they can fit compact hardware while receiving satellite signals with the correct circular polarization.
For product selection, the useful decision is whether the size, frequency band, polarization, gain, axial ratio, ground plane, cable, connector, and active or passive architecture match the final device.
Best starting point
If your requirement is GPS or GNSS positioning, start with the GPS patch antenna page. If your main concern is polarization quality, continue to the RHCP patch antenna technical page.
Main patch antenna types
| Type | Best for | Selection notes | Related page |
|---|---|---|---|
| Passive ceramic patch | Short RF paths and receiver boards | Check size, ground plane, band, polarization, impedance, and enclosure placement. | GPS patch antennas |
| Active GPS/GNSS patch assembly | Longer cable runs or remote mounting | Confirm LNA gain, bias voltage, noise figure, cable loss, connector, and filtering needs. | Manufacturer support |
| RHCP patch antenna | GNSS reception where circular polarization matters | Review axial ratio, phase-center stability, ground plane, and mounting position. | RHCP selection |
| Multi-band GNSS patch | Receivers using L1 plus additional GNSS bands | Check datasheet band coverage, dimensions, mechanical stack, and receiver compatibility. | Compare products |
| Custom cable or housing assembly | Projects that need a finished antenna | Prepare cable length, connector, mounting, label, packing, and compliance requirements. | OEM RFQ |
Key specifications to compare
| Specification | Why it matters | What to prepare before RFQ |
|---|---|---|
| Frequency band | The antenna must match the receiver and GNSS band plan. | GPS, GLONASS, Galileo, BeiDou, L1/L2/L5 or other target bands. |
| Polarization | GNSS receivers usually need RHCP reception for satellite signals. | Confirm RHCP requirement and any axial-ratio target from the receiver design. |
| Patch size | Larger patches can provide more aperture, while smaller patches need tighter integration care. | Maximum length, width, height, and available ground-plane area. |
| Active or passive | Passive patches depend on receiver front-end placement; active assemblies compensate cable loss. | Bias voltage, LNA gain range, cable length, connector, and filtering needs. |
| Mounting environment | Nearby batteries, displays, metal parts, and enclosure material can change antenna margin. | Photos, mechanical drawing, PCB layout context, and mounting position. |
Common patch antenna applications
Location devices
Asset tracking
Compact tracking hardware needs a patch antenna that balances size, ground plane, receiver sensitivity, battery layout, and enclosure material.
Connected mobility
Vehicle telematics
Telematics terminals often combine GNSS with cellular, WiFi, or IoT radios, so antenna placement and cable routing matter.
Precision positioning
RTK and surveying receivers
Higher-accuracy receivers may require tighter attention to polarization, multipath behavior, phase-center stability, and band support.
Field equipment
Precision agriculture devices
Outdoor positioning hardware needs stable mounting, environmental protection, and a practical match between module and antenna assembly.
Infrastructure
Timing and synchronization
Timing receivers need consistent GNSS reception, clean cable routing, and suitable active antenna gain when mounted away from the receiver.
Embedded modules
Compact GNSS modules
Small modules need careful patch size selection, ground plane planning, and enclosure testing before production sampling.
Engineering guide library
Use these supporting guides when you need deeper context before choosing a product or sending an RFQ.
Engineering guide
Design guide
Layers, substrate, ground plane, and integration basics.
Engineering guide
Gain
How patch size, placement, and ground plane affect signal margin.
Engineering guide
Bandwidth
Bandwidth factors and when multi-band designs matter.
Engineering guide
How to choose
A practical checklist for engineering and sourcing teams.
Engineering guide
RHCP vs LHCP
Polarization choice for GNSS and circularly polarized systems.
Engineering guide
Advantages and limits
Where patch antennas fit well and where care is needed.
Engineering guide
Radiation pattern
Broadside pattern, beamwidth, and installation effects.
Engineering guide
Patch antenna basics
Plain-English introduction to microstrip and ceramic patch designs.
FAQ
FAQ
Is a patch antenna the same as a GPS antenna?
No. A GPS antenna can use different structures. A GPS patch antenna is a low-profile patch design tuned for GPS or GNSS reception.
FAQ
Should I choose active or passive?
Choose passive when the receiver front end is close and designed for it. Choose active when cable loss or remote mounting requires LNA support.
FAQ
Why do GNSS patches use RHCP?
GNSS satellite signals are circularly polarized, so RHCP patch antennas help receive the intended signal orientation and reduce some reflected-signal problems.
FAQ
What should I send before RFQ?
Send the receiver model, target bands, size limit, ground-plane area, active or passive need, cable, connector, enclosure, mounting position, and sample quantity.
Need a patch antenna shortlist?
Send your module, frequency band, size limit, connector, cable length, mounting position, and expected quantity. Rftech can help narrow the product path before sampling.
