X0202 4 2005-09-28 0 0000922204 RF MONOLITHICS INC /DE/ RFMI 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 2005-09-28 4 P 0 2000 5.995 A 816905 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Cayman Fund, L.P. (Cayman), Special Situations Private Equity Fund, LP (PE), Special Situations Technology Fund, L.P. (Tech) and Special Situations Technology II, L.P. (Tech II), respectively. 311,580 shares of Common Stock and 555,550 Wts cvtd for 111,110 shares of CS are held by Cayman, 610,190 shares of Common Stock and 1,111,100 Wts cvtd for 222,220 shares of Common Stock are held by PE, 99,090 shares of Common Stock and 183,350 Wts cvtd for 36,670 shares of CS are held by Tech and 508,850 shares of Common Stock and 927,750 Wts cvtd for 185,550 shares of CS are held by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by Cayman, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. Austin W. Marxe 2005-09-30 David M. Greenhouse 2005-09-30