Design And Construction Of A Remote Controlled Tri–band Frequency Jammer.

The schematic of the interconnection between the VCO, the power amplifier and the antenna which make up the RF section is captured in Figure 3.10 below.
This chapter explains the methodology and the functionality of all the components that are used in the construction of this project. The development of Radio Frequency Jammer consist of the Power Supply, Intermediate Frequency section and Radio Frequency section. The device operates when the power supply gives ± 5V to IF and RF section. The triangular wave regulator will regulate the triangular waveform as an input to RF section. The triangular wave and the noise signal will be mixed in the mixer for the RF so that it will transmit the desired noise frequency. The mixture of the signal then will be transferred to clamper so that the clamper will give the desired voltage range between 0 to 3.5V for Voltage Controlled Oscillator. Then the signal will be amplified at power amplifier at RF section and then transmitted as a high noise frequency range 800 to 2100MHz This criterion was chosen because the antenna must transmit at the same frequency as the mobile signal frequency. When the ratio between the antenna frequency and the mobile signal frequency is 1:1, the mobile signal frequency will be blocked.
3.2.3.5    Chassis fabrication
This is the point where the packaging is decided based on the size and the number of items/parts to be fixed together in other to achieve my goal. A low cost and convenient package was considered. After a long search, I was able to get a portable case from an electrical store.  Finally, the pictures below show the completed project