7. The five basic issues to consider when assembling a printed circuit board for use at high frequency include which of the following? a. Wires become transmission lines. b. The length and geometry of the wires becomes an issue. c. Bends in the circuit board layout are an issue. d. At high frequencies you have to transition from some coaxial structure into a circuit board to properly launch the wave. e. Impedance match all elements in your circuit to minimizing ghosting within the circuit board. Make sure your components are impedance matched to minimize ghosting with. f all of the above g. only a.c.d h. only ab.c 8. RF chokes are used to? a. isolate the AC signal b. block DC voltages c. isolates the RF signal from the antenna d. isolate the DC circuit from the RF circuitry