Antenna Design

Let us design your next antenna exactly to your needs. Including simulation, antenna samples and verification.

Overview

Felicitas Customized Engineering can help you designing your antenna from the requirement to the finished verified product.

Applications

There are many types of antennas. Often it is immediately obvious which type is the most suitable for the job. In other cases, we first have to select the most suitable type based on your requirements.

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PCB Antennas

PCB antennas are easy and cheap to manufacture. They can be used at frequencies above a few hundred MHz. They require no height and (depending on the frequency) little space.

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Slot Antennas

A slot antenna is compromised by a slot in a sheet of metal. If appropriately excited, such a slot develops a similar field as a dipole antenna, only E and H are exchanged.

Slot antennas can be used with a metal frame if  there should not be any parts standing apart. A drawback usually is that the antenna will radiate to the inside of the housing as well. This often requires additional means for shielding.

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Patch Antennas

Those antennas combine some of the advantages of the PCB antenna with a better control over the radiation pattern. Off-the shelf patch antennas are often rather expensive. As any antenna, they are influenced by any structure within their near field. If this can’t be avoided, the properties of the antenna will deviate from the data sheet.

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Other Antennas

There are many other types of antennas (Yagi, Parabolic, Fractal, Log-periodic) or even combinations of those possible.  We will choose the one which is most appropriate for your application.

Details

Requirements

In order to design the right antenna for your application we need some input:

  • Minimum and maximum frequency of frequencies in case of a multi-bad antenna.
  • Available real estate. If available, 3D data are very helpful. We need to know about any objects within the near field of the antenna (0.5 to 2 wavelength from the antenna)
  • Required impedance (or data sheet of the transmitter)
  • Desired radiation pattern (including polarization)
  • Mechanical restrictions: shock and vibration, water, dust
  • Target quantity and price

Design

Based on the requirements, we create one or several concepts for the antenna. In that phase, the antenna is designed based on our experience and research. The design usually can’t take all aspects into consideration (for example any structures in the near field of the antenna). That is the task of later design steps.

Together with the customer the favorite design is chosen.

Simulation

The most promising design is entered into our FieldSolver 3D, a full wave simulator. The impedance and radiation pattern is checked for the frequencies of interest. Often adjustments are necessary to the original design to meet the requirements. When the design works satisfactory in the simulation, key data are extracted for the verification.

Verification

The antenna is constructed and checked with a vector network analyzer. If required, the radiation pattern are measured. All data are compared with the simulation. Sometimes slight adjustments have to be done to correct for simplifications or wrong assumptions in the simulation.