Coaxial Resonators

Skyworks offers ceramic coaxial line elements in seven sizes and four dielectric constants to span applications from UHF Frequencies up to 6 GHz. The VHF/UHF frequency bands are traditionally awkward for realizing discrete inductors and capacitors. Metallized ceramics provide an attractive alternative, since the wireless communication market now forces a continuous trade-off between performance and miniaturization.

Skyworks' ceramic solution offers advantages of high Q, reduced size, better shielding, and temperature performance superior to that obtainable from conventional L-C circuits or microstrip construction.

Two types of coaxial resonators are offered by Skyworks, a quarter-wave short (λ/4) and a half-wave open (λ/2). The quarter-wave has thick-film silver applied to one end. The half-wave has both ends un-metallized.

Trans-Tech's four dielectric materials are briefly summarized in the Material Selection chart along with their recommended frequencies of use. The Material Properties Chart can be used to determine the optimum material necessary for an application.


  • Low phase noise VCOs
  • VCO oscillators
  • Duplexer/diplexer filters
  • Band pass/notch filters


  • Frequency tolerance of 0.5% or 1%
  • Various dielectric constants - Er10 to Er90
  • Rugged construction
  • Low loss silver = Higher Qu
  • Act as parallel resonant circuit
  • Circuit miniaturization
  • Eliminate microphonics
  • Repeatability of design
  • Negligible aging effects
  • Excellent solderability
  • Thermal stabilization
Data Sheets Coaxial Resonators and Inductors (300 MHz to 6.0 GHz) Coaxial_Resonators_and_Inductors_202699A.pdf (1726 KB)
Application Notes Characteristic Impedance of Coaxial Resonators Characteristic_Impedance_of_Coaxial_Resonators 202723A.pdf (102 KB)
Application Notes Coaxial Resonators for Voltage-Controlled Oscillator (VCO) Applications Coaxial_Resonators_for_VCOs_202664A.pdf (351 KB)
Application Notes Coaxial Resonator Dimensions and Configurations dimensions_configurations.pdf (43 KB)
Application Notes Frequency Tuning of Coaxial Resonators Frequency_Tuning_Coaxial_Resonators_202722A.pdf (104 KB)
Application Notes Glossary of Terms for Coaxial Resonators and Coaxial Inductors Glossary_of_Terms_202728A.pdf (103 KB)
Application Notes Measuring SRF and Q of Coaxial Resonators Measuring_SRF_Q_of_Coaxial_Resonators_202724A.pdf (137 KB)
Application Notes Computer Simulation of Coaxial Resonators no1009.pdf (41 KB)
Miscellaneous Material Analysis of Trans-Tech Coax Resonator Materials COAX_RoHS_Summary.pdf (98 KB)
Miscellaneous Qualification Summary for RoHS-Compliance Coaxial Resonators QualSummaryCoax.pdf (80 KB)
Miscellaneous PCB Filters Reflow Process Compatibility for Lead (Pb)-Free and RoHS Compliant ReflowPCB_Filters.pdf (100 KB)
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