Antenna PCB Manufacturing for RF & High Frequency Applications

An antenna PCB is a printed circuit board designed for RF signal radiation, reception, transmission or antenna module integration. Unlike standard signal PCBs, antenna PCBs require tight control of dielectric constant (Dk), copper pattern geometry, and surface finish to maintain consistent radiation pattern and resonant frequency. Even a ±0.1 shift in Dk can cause a measurable frequency drift in a patch antenna design. Common antenna PCB types include patch antennas, slot antennas, dipole antennas, MIMO arrays and phased array modules for WiFi, 5G, GPS, radar and satellite communication applications.

Material choice depends primarily on working frequency and loss requirement. For 2.4GHz and 5GHz WiFi or Bluetooth antenna PCBs, F4BM220 (Dk 2.20, Df 0.0010) or Rogers RO4350B (Dk 3.48, Df 0.0037) are common choices. For 5G sub-6GHz and mmWave antenna PCBs, RO4350B and RO3003 (Dk 3.0, Df 0.0010) are widely specified. For radar and satellite antenna PCBs requiring ultra-low loss, RT5880 (Dk 2.2, Df 0.0009) or Taconic TLY-5 (Dk 2.22, Df 0.0009) are preferred. Taconic RF-35 (Dk 3.5, Df 0.0018) offers a cost-effective middle ground for RF antenna modules.

Antenna resonant frequency is directly determined by the electrical length of the antenna element, which depends on the substrate Dk. If Dk varies across the board or between production batches, the antenna resonant frequency shifts and radiation pattern degrades. For a 5GHz patch antenna, a Dk variation of ±0.1 can cause a frequency shift of roughly 100–150MHz — enough to move the antenna outside its intended frequency band. We use materials with tight Dk tolerance such as Taconic TLY-5 (Dk 2.22 ±0.02) and Rogers RO4350B (Dk 3.48 ±0.05) for antenna PCB projects where frequency accuracy matters.

Antenna PCBs contain RF feed lines that connect the antenna element to the transceiver circuit. These feed lines must be designed and manufactured to a specific characteristic impedance — typically 50Ω — to minimize signal reflection and maximize power transfer to the antenna. An impedance mismatch in the feed line causes signal reflection, reduces antenna efficiency, and increases return loss. We support 50Ω controlled impedance with tolerance ±10% standard and ±5Ω for values below 50Ω, verified by impedance testing before delivery. Trace width tolerance is controlled to ±0.01mm to maintain impedance consistency.

Yes. Engineering review is included before production for all antenna PCB projects. We review material suitability for the working frequency, stackup structure, dielectric thickness between antenna layer and ground plane, copper thickness, impedance design, trace width calculation, and production feasibility. For multilayer antenna PCBs with hybrid stackups, we also review material compatibility and lamination sequence. Please send Gerber files, stackup drawing, working frequency and impedance requirements when requesting review.

Minimum trace width and spacing is 2.5mil/3mil for advanced capability and 3mil/4mil for standard production. Trace width tolerance is ±0.01mm. For antenna PCB designs, the feed line width is calculated based on substrate Dk, dielectric thickness and target impedance. We can verify your trace width calculation during engineering review before production to ensure the manufactured board matches your impedance design.

Please prepare: Gerber files (ZIP format), material requirement (e.g. Rogers RO4350B 0.508mm), PCB stackup, board thickness, copper thickness, surface finish, quantity, working frequency, and impedance requirements. For antenna PCBs, please also include the dielectric thickness between the antenna layer and ground plane, as this directly affects both impedance and antenna resonant frequency. Gerber files can be sent via WhatsApp or email after initial contact.