efficiency and little side effects of this kind of treatment method. With the aforementioned benefits, PMCT will be widely used in treating different tumors. In this letter, the principle and geometry of one improved MPC system are investigated in this article; the main parts of the system are briefly introduced. The improved MPC takes the features of convenience of operation and maintenance. A large number of experiments on porcine liver are carried out, and the temperature distribution within the liver are measured and illustrated, for cases of different injected microwave power and ablation time. Based on a large amount of measured data from the in-vitro experiments, the graphics of the coagulation area in porcine livers are reconstructed, demonstrating obvious change from conglobulation to ellipsoid. The minimum diameter of coagulation area is about 2 cm, and it can reach 6 cm with the increase of microwave output power of the instrument (i.e., MPC), while the transverse diameter can reach ϳ3.5 cm. These experimental researches can probably provide some useful reference to the clinic treatment of the liver cancer using MPC system. , Computer-aided dynamic simulation of microwaveinduced thermal distribution in coagulation of liver cancer, IEEE Trans Biomed Eng 48 (2001), 821-829. ABSTRACT: An opto-electronic integrated circuit based on the hybrid scheme for an optical receiver front-end is presented in this article. The proposed integrated circuit adopts the CMOS technology as the vehicle to integrate the InP-based waveguide photodetector into the transimpedance amplifier (TIA) circuit. A regulated cascade structure is used to reduce the input impedance of the TIA. Hence, the proposed integrated circuit can achieve a very high bandwidth provided that the parasitic capacitance of the photodetector is up to 1 pF. The 3-dB bandwidth and the transimpedance gain of the proposed circuit are 1 GHz and 64.5 dB⍀, respectively. ABSTRACT: A series-fed eight-slot microstrip array antenna operating at 3.5 GHz with a cosecant-squared shape beam is presented. The shaped radiation pattern is achieved by changing only the characteristic impedance of the series fed line between slots. The proposed antenna has a shaped-beam with elevation coverage of 35°, a gain of 10.86 dBi, and side lobe levels less than Ϫ19 dB. Since the slots and fed strip are fabricated on a single substrate, the antenna is easy to manufacture and low cost. Experimental results demonstrate the validity of this design.
