radar transmitter

           Radar generally made with a single antenna so with person who has no knowledge of radar this is strange because how a single antenna work as both transmitter and receiver , here lies the twist firstly a small detailed knowledge of types of radar is required .There are two types of radars namely Continuous wave radar and Pulse radar.  On by looking at the names we can find some sort of clue here continuous radar is one which can send signal continuously while that of pulse may be a little different .. Without confusing let us confine with one type of radar let it be pulse radar,  generally what happens with rulse radar is that it sends pulses of signals strictly speaking em waves as pulses,then what happens is that the same transmitter which is used for transmitting is used as receiver during the time of interval between pulses, then on there lies a technical complication, generally a transmitter signal will have more power than that of receiver signal if this is the case receiver should be highly sensitive than that of transmitter to find more signals, but if the transmission and reception is done with same antenna how come this be possible i mean this may lead to damage of hardware , so practically what happens is that during the transmission some amount of signal will get leaked so during the reception the receiver compares the received signal with the leaked transmission signal. hence the problem is solved and surprisingly a leaked out signal is used as a reference