SHF AMPLIFIER Russian patent published in 2001 - IPC

FIELD: radio engineering. SUBSTANCE: proposed amplifier can be used as amplifier of SHF power based on electron tubes, transistors and other active elements. SHF amplifier includes n= 2^k, (where k= 2, 3)-integral number of identical power amplifiers 1, n-channel divider 2, power adder 3 and ballast resistors 4. Each power amplifier is placed between proper output of divider 2 and input of power adder 3. Dividers and adders are formed by quadrature bridges-eight-terminal networks 5 and each quadrature bridge comes in the form of 4n-terminal network in which quadrature bridges are arranged in k rows with 0.5n quadrature bridge 5 in each row. Inputs of quadrature bridges 5 of first row form n inputs of 4n-terminal network, outputs of quadrature bridges 5 of k-th row form n outputs of 4n-terminal network. Outputs of quadrature bridges of i-th row (where I= 1, 2,...k-1) are connected to inputs of quadrature bridge 5 of (i+1)-th row in agreement with Batler matrix circuit, that (n-m+1)-th output of adder 3 gain factor to which from m-th input of divider 2 is close by modulus to gain factor of power amplifier 1 corresponds to each m-th input of divider 2, with m=1, 2, n. In this case m₁--th input of divider 2 is input of SHF amplifier, p-1 of other inputs of divider 2 , m₂-th, m₃-th, ...m_p- -th where 2≅p≅0.5n are connected correspondingly to (n-m₁+1)-m,-th, (n-m₂+1)-m,-th, (n-m₃+1)-m,-th ...(n-m_p-1+1)-m-th outputs of adder 3, (n-m_p+1)- th output of adder 3 is output of SHF amplifier and ballast resistors 4 are connected to remaining n-p inputs of divider 2 including (n-m₁+1)-th, (n-m₂+1)-th, (n-m₃+1)-th,...(n-m_p+1)-th and to n-p outputs of adder 3 including m₁-th, m₂-th, m₃-th, m_p-th. If k=3 (n=8) divider 2 has outputs 6 and adder 3 has inputs 7. Outputs 23, 22,...16 of adder 3 correspond to inputs 8, 9,...15 of divider 2. Input 8 of divider 2 is input of SHF amplifier , with p=4 three other inputs 9, 10 and 11 of divider 2 are connected correspondingly to outputs 23, 22 and 21 of adder 3. Output 20 of adder 3 is output of SHF amplifier and ballast resistors 4 are connected to remaining inputs 12, 13, 14 and 15 of divider 2 and to outputs 16, 17, 18 and 19 of adder 3. EFFECT: raised gain factor thanks to p- multiple transmission of signal through active elements of power amplifiers. 2 dwg