Linear antenna switch arm
View Patent ↗A linear antenna switch arm comprising a plurality of field effect transistors connected in series, the drain of each transistor being connected to the source of the next transistor at a join, the end source comprising one of a signal input or output port and the end drain comprising the complementary signal output port or input port; a signal line extending between the input and output ports; at least one of the joins being connected to the signal line at a node by a connection line; the signal line comprising at least one resistor between signal input and output ports; and the connection line comprising at least one resistor.
1. A linear antenna switch arm comprising:
a plurality of field effect transistors connected in series, a drain of each transistor being connected to a source of the next transistor at a join, an end source comprising one of a signal input or output port and an end drain comprising a complementary signal output port or input port;
a signal line extending between the input and output ports;
at least one of the joins being connected to the signal line at a node by a connection line;
the signal line comprising at least one resistor between signal input and output ports; and
the connection line comprising at least one resistor.
2. A linear antenna switch arm as claimed in claim 1 , wherein a plurality of joins are connected to the signal line at nodes by connection lines, each connection line including a resistor.
3. A linear antenna switch arm as claimed in claim 2 , where adjacent nodes are electrically shorted together by the signal line.
4. A linear antenna switch arm as claimed in claim 1 , wherein the signal line comprises a resistor between the signal input port and a first node in the signal line.
5. A linear antenna switch arm as claimed in claim 1 , wherein the signal line comprises a resistor between the signal output port and a last node in the signal line.
6. A linear antenna switch arm as claimed in claim 1 , wherein at least one of the connection lines comprises a diode.
7. A linear antenna switch arm as claimed in claim 1 , wherein the signal line further comprises at least one diode.
8. A linear antenna switch arm as claimed in claim 1 , wherein gates of the field effect transistors are connected to a control line by resistors.
9. A linear antenna switch arm as claimed in claim 3 , wherein the signal line comprises a resistor between the signal input port and a first node in the signal line.
10. A linear antenna switch arm as claimed in claim 9 , wherein the signal line comprises a resistor between the signal output port and a last node in the signal line.
11. A linear antenna switch arm as claimed in claim 4 , wherein the signal line comprises a resistor between the signal output port and a last node in the signal line.