Ceramic antenna vs PCB antenna is one of the most common decisions in embedded wireless design, and the honest answer is that they win for different reasons. A ceramic chip such as RFTECH’s GL916R35 is tiny and tuned to one band (916 ± 3 MHz for LoRa/ISM, VSWR ≤ 2.0). An FPC/PCB antenna such as the GLFPC01 is a 70 × 20 × 2.5 mm flexible strip on a U.FL cable that covers a much wider 698–960 / 1710–2700 MHz range. Same goal — a compact internal antenna — but two very different trades.
The mistake is to compare them as line items on a BOM. They are system decisions: each pushes the complexity into a different part of the design.
What is a ceramic antenna here?
A ceramic antenna is a discrete component whose radiating element sits on high-dielectric ceramic, which shrinks it to a small surface-mount chip. The GL916R35 above is typical: a single-band 916 MHz part for sub-GHz ISM/LoRa, soldered onto the board.
Its strengths:
- Very small footprint for tight layouts
- Clean mechanical profile inside a sealed enclosure
- A discrete part you can specify and source separately
- A good fit when antenna volume is severely limited
Its main challenge is integration sensitivity: the PCB ground plane, enclosure material, and nearby components strongly affect the result, and a single ceramic element is usually tuned to one band.
What is a PCB antenna?
“PCB antenna” covers two related things: an antenna etched directly into the circuit-board copper (a trace antenna), and a flexible printed-circuit (FPC) antenna mounted inside the housing and fed by a short coax. The GLFPC01 FPC antenna is the flexible kind: 698–960 / 1710–2700 MHz, VSWR ≤ 2.0, vertical polarization, 70 × 20 × 2.5 mm, terminated in a U.FL connector.
Two things stand out compared with the ceramic chip. First, this FPC covers a much wider, multiband cellular range rather than a single ISM band. Second, the U.FL cable lets you place the antenna away from noisy components instead of being fixed at one spot on the board — useful when the best electrical location and the available mechanical space disagree.
Ceramic vs PCB antenna: real-spec comparison
| Factor | Ceramic chip (GL916R35) | FPC / PCB (GLFPC01) |
|---|---|---|
| Form | Discrete SMD ceramic chip | Flexible printed film + U.FL cable |
| Example frequency | 916 ± 3 MHz (single ISM/LoRa band) | 698–960 / 1710–2700 MHz (wide 4G/LTE) |
| Bandwidth | Narrow, tuned to one band | Broad, multiband |
| Size | Tiny chip footprint | 70 × 20 × 2.5 mm strip |
| VSWR | ≤ 2.0 | ≤ 2.0 |
| Connection | Soldered to PCB; needs a ground plane | U.FL cable to the module; placement is flexible |
| Layout sensitivity | High (ground-plane dependent) | Moderate (cable lets you move it from noise) |
Neither is automatically simpler. The ceramic chip keeps the part tiny but loads the work onto layout and ground-plane discipline; the FPC adds a cable and a placement step but buys wide bandwidth and freedom to position the radiator.
When a ceramic antenna is the better choice
Ceramic wins when the envelope is very small and you want a compact, well-defined component you can drop into a tight industrial design.
- The device is extremely space-constrained
- The mechanical team wants no visible antenna features
- The architecture already budgets for careful RF tuning
- The operating need is a single, well-defined band
A part like the GL916R35 ceramic antenna is easiest to use when the product can give it a clean keep-out area and a stable enclosure.
For satellite positioning specifically, the most common ceramic form factor is the GPS/GNSS ceramic patch antenna.
When a PCB antenna is the better choice
An FPC/PCB antenna is compelling when you need wider band coverage, or when the board and enclosure are co-designed so the radiator gets enough room.
- You need multiband cellular coverage from one compact antenna
- The U.FL cable’s placement freedom helps avoid internal noise sources
- Reducing discrete RF parts suits the assembly strategy
- Mechanical and RF teams design the board and housing together
In compact IoT systems this overlaps with the constraints in 2.4 GHz IoT antenna design.
The biggest mistake: comparing only size and cost
Reducing the question to “which is smaller?” or “which is cheaper?” usually causes trouble later. The real comparison includes:
- Bandwidth requirement (one band vs multiband)
- Ground-plane availability
- Nearby shielding, batteries, displays and metal
- Casing material and final enclosure shape
- Production variation across batches
- Tuning, matching and test budget
An antenna that looks cheap on the schematic gets expensive if it adds tuning cycles, delays certification, or hurts yield.
Performance depends on the finished device
In embedded RF, antenna performance belongs to the finished product, not the part. Two teams can pick the same GL916R35 or the same GLFPC01 and get different results depending on layout discipline and enclosure behaviour. So the useful question is not “which is best” but “under which conditions does each become the better answer.”
Best choice by project condition
Choose a ceramic antenna when:
- The device is very small
- You want a discrete embedded component
- You can commit to matching, tuning and validation
- One stable band and a predictable enclosure are enough
Choose a PCB/FPC antenna when:
- You need wide or multiband coverage
- Cable placement freedom helps the layout
- Fewer discrete RF parts suits the build
- Board and enclosure are designed as one system
Questions before you choose ceramic or PCB
- What band or bands must be covered — one, or several?
- How much free antenna area and ground plane is truly available?
- What metal parts sit nearby?
- Could the housing change late in development?
- Does the team have time for tuning iterations?
If those answers are vague, the project is not ready for a final antenna commitment.
Which architecture fits your product
Ceramic vs PCB is not “which technology is best” but “which tradeoff fits this product.” A ceramic chip like the GL916R35 wins when space is extremely tight and one band is enough; an FPC like the GLFPC01 wins when you need wide multiband coverage and placement freedom. For a real device program, review all antenna products and request a quote and share the target band, PCB size, enclosure material and keep-out area.
Frequently asked questions
Is a ceramic antenna better than a PCB antenna?
Neither is universally better. A ceramic chip (e.g. GL916R35, 916 MHz) is best when space is extremely limited and you need one band; an FPC/PCB antenna (e.g. GLFPC01, 698–2700 MHz) is best when you need wide multiband coverage or the freedom to place the radiator via a cable. Match the choice to the band plan and enclosure.
Which is smaller, a ceramic or a PCB antenna?
A ceramic chip has the smallest footprint on the board. An FPC strip like the GLFPC01 (70 × 20 mm) takes more area but is thin and flexible, and a board-trace antenna uses copper you already have. “Smaller” depends on whether you mean board footprint or total volume including cable.
Do PCB and ceramic antennas need a ground plane?
Both interact with the ground plane, but the ceramic chip is the more ground-plane-dependent of the two — its rated performance assumes a minimum ground length. An FPC antenna fed by U.FL gives more freedom to place the radiator, though the system ground still matters.
Can a PCB antenna cover multiple bands?
Yes. The GLFPC01 covers 698–960 and 1710–2700 MHz, spanning most 4G/LTE bands from one antenna, whereas a single ceramic chip is normally tuned to one band. For multiband products, a wideband FPC or a multiband design is usually simpler than several chips.
Which is cheaper?
It depends on volume and integration. A ceramic chip is an added component but needs careful tuning; a trace PCB antenna adds almost no part cost but spends engineering time; an FPC adds a part and a cable but simplifies placement. Compare total cost — parts plus tuning, test and yield — not the unit price alone.
