The document discusses different modes of propagation for electromagnetic waves including TE, TM, and TEM modes. It explains that TE modes have electric fields perpendicular to the direction of propagation, TM modes have magnetic fields perpendicular to propagation, and TEM modes have both electric and magnetic fields perpendicular to propagation. It also discusses the cutoff frequency and wavelength for different waveguide modes and provides an example of calculating these values for a rectangular waveguide.

1. Pertemuan 5 - 7 PANDU GELOMBANG Umiatin, M.Si Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam

4. Rambatan Cahaya Gelombang merambat secara spheric If didekat sumber Gelombang merambat secara planar If relatif jauh dari sumber 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

6. Rambatan GEM Polarisasi bisa linear ataupun elliptical / circular tergantung nilai medan E dan H. 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

9. Penampang WG 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

11. Propagasi Multimode 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

14. Mode TE transverse electric (TE) mode: A mode whose electric field vector is normal to the direction of propagation . Note: TE modes may be useful modes in waveguides. In an optical fiber , TE and TM modes correspond to meridional rays . meridional ray: In fiber optics , a ray that passes through the optical axis of an optical fiber (in contrast with a skew ray , which does not). 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

16. Cutt0ff wavelength cutoff wavelength: 1. The wavelength corresponding to the cutoff frequency . ( 188 ) 2. In an uncabled single-mode optical fiber , the wavelength greater than which a particular waveguide mode ceases to be a bound mode . ( 188 ) Note 1: The cutoff wavelength is usually taken to be the wavelength at which the normalized frequency is equal to 2.405. Note 2 : The cabled cutoff wavelength is usually considered to be a more functional parameter because it takes into consideration the effects of cabling the fiber. 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

18. Mode TM transverse magnetic (TM) mode: A mode whose magnetic field vector is normal to the direction of propagation . Note: TM modes may be useful in waveguides. In an optical fiber , TE and TM modes correspond to meridional rays . 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

19. Mode TEM transverse electric and magnetic (TEM) mode: A mode whose electric and magnetic field vectors are both normal to the direction of propagation . Note: The TEM mode is the most useful mode in a coaxial cable or Radio propagation. 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |

21. TERIMA KASIH 02/02/11 © 2010 Universitas Negeri Jakarta | www.unj.ac.id |