hi everyone in this video I am going to explain about MTA radar with the power amplifier transmitter so MTA radar we have already seen in the previous video MTA radar stands for moving Target indicator moving Target indicator so moving Target indicator and pulse Doppler radar these two are used to identify the moving targets among the stationary collectors stationary collectors collectors are nothing but stationary objects which are an end which are not required in the case of MDA radar and pulse Doppler radar so MTA radar is specially designed for the identification of moving targets among large number of clutters by using pulse transmitters okay these are these are empty radar and pulse Doppler radar are originated from the pulse Doppler Radars so definitely in the empty radar case also we are using a pulse transmitter modulated signal we are transmitting and in the receiving part we are taking the difference between the transmitter transmitted signal and received signal to get the time difference and as well as Doppler frequency shifter okay so this is the empty area now empty radar can be designed with two different types there are two types of empty Radars available they are they are the first one is emti radar with power amplifier transmitter power amplifier as transmitting section over amplifier transmitter and the second type of empty reader is MTI radar with power oscillator transmitter okay so by seeing these two names we can understand that in the transmitting section one time we are using power amplifier and in the transmitting section another time you are using power oscillator and power oscillator section okay but the receiver part is almost same because the receiver is having must be having a mixer to mix the receiver signal with the transmitting signal to get the difference between the transmitted signal and the received signal to find what is the Doppler frequency shift occur after some time okay so in the transmitting section of this empty radar we are using amplifiers that means internally signal is generated and it is Amplified and then transmitted then the such type of empty routers are known as MTA radar is empty radar with power amplifier transmitter and if we are generating the signal itself oscillating section by using a high power employee for oscillators like magnetron oscillators then it is empty header with the power oscillator so here example I will tell you here examples of this empty radar with the power amplifiers and empty radar with the power oscillators are empty power amplifier example is so in the case of power amplifier we can take example as power amplifier Klystron amplifiers Klystron amplifier so Klystron amplifieds can be used as power amplifiers for the design of empty radar with power amplifiers and in power oscillator section for power oscillators we will use magnetron oscillator migrate run oscillator so these are the two different types of main devices we are using in the transmitting section so if you are incorporating an amplifier hyper amplifiers like a chrysron amplifier then it will be a empty adder with the power amplifier transmitter and if you are using magnetron oscillator that means the signal will be generated within the oscillations itself then it is known as empty router with power oscillator transmitter now in this video I am going to explain about emptier added with the power amplifier transmitter okay in the next video I will explain power oscillator transmitter so empty Rudder with the power amplifier transmitter so this is the block diagram of MTA radar with the power amplifier transmitter the block diagram looks somewhat uh complex but it is very easy if you understand see the transmitting section what are the different components involved in the transmitting section see by seeing the diagram alone we cannot identify which is the transmitting section which is the receiving section because if there is a section called receiver Exciter which is there in between transmitting section and receiving section see the stallow Coho and this mixer the combination of these three is known as receiver Exciter receiver Exciter okay the same combination the same setup we will be also have in the case of empty radar with the power oscillator transmitter here also we have the same setup as table of loss letter stylus stands for stallo stands for stable log class letter Coho stands for coherent oscillator we will write here in the next slide so that if it is very easy to understand for you when you go through stallow stallow means stable local oscillator with a frequency efl okay stallow stands for stable log class letter with a frequency FL and a Coho stands for coherent oscillator it is also like a block loss letter better with every different frequency like if this stable local this coherent oscillator is equal to intermediate frequency generator you should know this point intermediate frequency generator that means we can say FC is equal to F ief intermittent frequency you have seen nothing but coherent oscillator frequency that is equal to intermittent frequency okay now coming to the block diagram so stable or class letter generates a lock last letter frequency FL and coherent oscillator which is coherent means in Phase what do you mean by coherent in Phase so that frequency generated by this FC as fif okay I will tell you what do you mean by interface now these two signals are mixed together mixed together by throw this mixer and given to this power amplifier because in the MTI radar with the power amplifier transmitter we are using a section called power amplifier amplifier does not have the ability to produce the signal itself Okay it definitely depends on a source we need a generator that signal will be taken by this power amplifier and it amplifies the signal and transmits that's it it cannot generate the signal on its own that's why we are taking the Exciter Exciter receiver Exciter part where it acts between receiver and as well as transmitter because the local oscillator in C pulse modulator gives a pulses I told you already MTA radar transmits MD radar and pulse Doppler radar both are working with the pulses okay transmit samples and waiting for the receiving signal so pulses are being generated by this pulse modulator but internal carrier signal cannot be generated we need a carrier signal also for this modulation so that carrier signal nothing but high frequency signal cannot be generated by this transmitting session definitely we need a lock loss later or a continuous wave generator that can be nothing but mixing of stable or class later curve signal and as well as coherent signal the purpose of coherent signal is to make the transmitted signal and received signal in Phase with each other okay the purpose of coherent signaling coherent oscillator is to make the transmitted signal and receive signal in Phase with each other so that when we are retrieved when we are receiving the back after some time we can eliminate whatever that frequency we have added in the transmitting section okay that's why they are having the connections with receiver also in this direction in the backward Direction okay so now these two are mixing together f l plus FC these two are given to power amplifier so power amplifier and this pulsum signal are these two are modulated together these two signals are modulated together and produces a modulated signal pulse modulated signal here it is pulse modulated signal this pulse modulated signal with a frequency what is the frequency of the transmitter signal now FL plus FC because whatever the signal we have taken here f l plus FC that will come here and duplexer as we are using a single antenna definitely duplexer should be there what is the purpose of duplexer it is used to transmit the transmittings during transmission the signal will be transmitted only in this direction during the section the signal will be transmitted only in this direction okay and during transmitting section the signal will not come through towards this receiver only some part of leakage signal very very least amount of leakage signal will come but that cannot be considered okay so duplexer is a device which is used to separate the transmitting and receiving signals and during reception what happens the transmitted signal will be added with some Doppler frequency depending upon the target moment okay so if the target is coming towards the radar system then it is plus FD if the target is moving away from the radar system then it is minus ft so depending upon the moment of the object or the transmitted signal frequency f l plus FC plus r minus FD will come now we need to eliminate one by one actually we don't need FC is also not required so that's why first law class letter signal is being added from the stable log class editor so your fill is illuminated later it will be Amplified through if amplifier because I told you already FC component is nothing but your intermediate frequency component that's why we are using an if amplifier to amplify the component later in order to detect what is the original signal and eliminate the transmitted signal frequency again coherent translator output is also given as the reference signal to the phase detector to detect only the required signal that is FD so output of this one is given to delay line canceler I will tell you what is delay line canceler then you can understand the purpose of this one delay line canceler is used to convert AC signal to DC signal okay to in order to display on the PPI display in order to display on the PPA display okay I will write off I will write two more points here duplexer see whichever is new to you I am writing here because I have explained everything orally duplexer is a device foreign transmitting and receiving signals okay this duplexes is necessary when we are using single antenna okay and what else is known to you is unknown to you delay line canceler what is the purpose of delay line canceler delay line canceler actually delay line canceler we are using I told you already in the case of butterfly effect Butterfly Effect we are having stationary Target ecos and as well as moving Target ecosure so how the stationary targeting course can be eliminated from the moving Target because when you are superimposing all the signals if you want you can go back and see the previous video uh the butterfly effect can is nothing but when you're opening posing all the received signals for n number of pulses then the amplitude of whose Target is changing that is nothing but your moving Target the amplitude of remaining targets nothing but stationary targets are always constant for any number of pulses but when the on the escort display this nature kill okay but when you are displaying such type of signals on PPI display it is not possible because PPA is plan position indicator which gives only DC values not AC values so that's why delay line cancelers are used to convert AC component into DC component or in other words we can say we can also say bipolar video pattern bipolar video pattern into are also be used to convert bipolar video pattern into unipolar video pattern unipolar video pattern this is very very important point you need to understand because when you are going for displaying on PPI display bipolar video patterns cannot be displayed on PPI display but Esco display can display a scope is nothing but is having an amplitude variation so amplitude variations can be like this so it will be having both positive and as well as negative bipolar video pattern but on PPI display which can display only blips like this so it will be having some concentric circles some blips are there like this the position of the target can be indicated in terms of bliblic is nothing but a point at certain distance so it will be not having any bipolar pattern so in order to display such type of waveforms on the empty radar output or pulse Doppler radar output such type of moving Target outputs PPA display definitely you should go for are very very important to convert bipolar to unipolar or you can also see AC compared to DC component in other terminology okay this is the empty Rider with the power amplifier transmitter thank you