# Bempp for electromagnetic wave transportation question

**URL:** <https://bempp.discourse.group/t/bempp-for-electromagnetic-wave-transportation-question/304>\
**Category:** Bempp\
**Created:** [20 January 2025 14:25 UTC](https://bempp.discourse.group/t/bempp-for-electromagnetic-wave-transportation-question/304 "2025-01-20T14:25:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Liang](https://avatars.discourse-cdn.com/v4/letter/l/54ee81/32.png) [@Liang](https://bempp.discourse.group/u/Liang)\
**Post date:** [20 January 2025 14:25 UTC](https://bempp.discourse.group/t/bempp-for-electromagnetic-wave-transportation-question/304/1 "2025-01-20T14:25:13Z")

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Hello. I saw many examples of using Bempp to calculate the EM scattering problems. I wonder if Bempp can also be used to calculate the EM wave propagating in a waveguide structure. In this case, how I can excite a proper waveguide mode on the injection surface, which is normally recognised as a waveguide port?