The detection of radiation in the range of submillimeter and far infrared wavelengths has various applications in remote passive radiometric sensing, some times called as thermosensing, such as imaging of field targets, power line surveys, night vision, radio meteorology, atmospheric propagation and astrophysics. Developments directed to potential interest for telecommunications in that band have been increasing in recent years. The development of a non-imaging bolometer detector for incoherent radiation in the submillimeter bands is presented. Construction details are presented for a detector's active material using polycrystalline and amorphous silicon. We describe the bandpass filters to be placed in front of the detector, which are being designed to be constructed using the resonant mesh technology, centered at the peak frequencies around 220, 410 and 670 GHz. The bolometric system will be submitted to qualification and performance tests at the focal plane of a 1.5-m submillimeter reflector located at a high altitude dry site (El Leoncito, Argentina Andes), using the Sun as a source of blackbody radiation, and a beacon transmitter at 410 GHz located in the far field with respect to the reflector. The first applications considered for the system are measurements of atmospheric propagation, solar imaging and tentative detection of solar transients (flares) in the selected bands. 785789Eminoglu, S., Tezcan, D.S., Akin, T., A CMOS N-weell Miorobolometer FPA with Temperature Coefficient Enhancement Circuitry (2001) SPIE, 4369, pp. 240-249Murphy, D., Ray, M., Wyles, R., Asbrock, J., Lum, N., Kennedy, A., Wyles, J., Kostrzewa, T., High sensitivity (25 μm pitch) micro-bolometer FPAs and application development (2001) SPIE, 4369, pp. 223-234Savry, O., Agnèse, P., Arrays of bolometer detector for millimeter wave imaging: Feasibility, performances and construction of a prototype (2001) IRMMW ToulousePhillips, T.G., Techniques of submillimeter astronomy (1988) Millimetre and Submillimetre Astronomy, 147, pp. 1-25Dobrzanski, L., Nossarzewska-Orlowska, E., Nowak, Z., Piotrowski, J., Micromachined silicon bolometers as detectors of soft X-ray, ultraviolet, visible and infrared radiation (1997) Sensors and Actuators A, 60, pp. 154-159Sedky, S., Fiorini, P., Cayamax, M., Verbist, A., Baert, C., IR bolometers made of polycrystalline silicon germanium (1998) Sensors and Actuators A, 66, pp. 193-199Core, T.A., Tsang, W.K., Sherman, S.J., Fabrication technology for an integrated surface-micromachined sensor (1993) Solid State Technology, 36Lee, S.J., Lee, Y.H., Suh, S.H., Oh, Y.J., Kim, T.Y., Oh, M.H., Kim, C.J., Ju, B.K., Uncooled thermopile infrared detector with chromium oxide absorption layer (2001) Sensors and Actuators A, 95, pp. 24-28Porterfield, D.W., Hesler, J.L., Densing, R., Mueller, E.R., Crowe, T.W., Weikle II, R.M., Resonant metal-mesh bandpass filters for the far infrared (1994) Appl. Opt., 33 (25), pp. 6046-6052. , SeptChase, S.T., Joseph, R.D., Resonant Array bandpass filters for the far infrared (1983) Appl. Opt., 22 (11), pp. 1775-1779. , JuneTomaselli, V.P., Edewaard, D.C., Gillan, P., Möller, K.D., Farinfrared bandpass filter from cross-shaped grids (1981) Appl. Opt., 20 (8), pp. 1361-1366. , AprilMacdonald, M.E., Alexanian, A., York, R.A., Popovic, Z., Grossman, E., Spectral transmittance of lossy printed ressonant-grid terahertz bandpass filters (2000) IEEE Trans. Microwave Theory and Techniques, 48 (4), pp. 712-717. , AprilLiebe, H.J., Modeling attenuation and phase of radio wave in air at frequencies below 1000 GHz (1981) Radio Science, 16 (6), pp. 1183-1199Ulich, B.L., Improved Correction for Millimeter-Wavelength Atmospheric Attenuation (1980) Astrophysical Letters, 21, pp. 21-28Holdaway, M.A., Pardo, J.R., Modeling of the submillimeter Opacity on Chajnantor (1997) NRAO MMA Memo, 187. , USAKaufmann, P., Costa, J.E.R., De Castro, C.G., Hadano, Y.R., Kingsley, J.S., Kingsley, R.K., Levato, H., Silva, V.R., The New Submillimeter-wave Solar Telescope (2001) Proc. SMBO/IEEE MTT-S International Microwave and Optoelectronics Conference, p. 439. , August 6-10, Belém, PA, BrasilMello, A.M., De Castro, C.G., Kaufmann, P., Levato, H., Marún, A., Pereyra, P., Raulin, J.P., Determination of Submillimeter Atmospheric Opacity at El Leoncito, Argentina Andes (2003) Telecomunicações Inatel, , in press