A Single-Pole Single-Throw, SPST, or Single-Pole Multi-Throw, SPMT, transformer based switch configured to be connected to a power amplifier, PA, and a Low Noise Amplifier, LNA,, said transformer based switch comprising: - an input single pole port, and - a PA circuit comprising: - a first transformer having a primary and secondary winding, wherein one end of the primary winding is directly connected to the input single pole port and the other end is configured to be directly connected to a ground potential, - an output port comprising a first output port directly connected to one end of the secondary winding of the first transformer and a second output port directly connected to the other end of the secondary winding of the first transformer, - at least one positive port switch directly connected at one end to a positive end of the secondary winding of the first transformer, the other end of the switch being configured to be directly connected to the ground potential, and - at least one negative port switch directly connected at one end to a negative end of the secondary winding of the first transformer, the other end of the switch being configured to be directly connected to the ground potential, - a LNA circuit comprising: - a second transformer having a primary and secondary winding, wherein one end of the primary winding of the second transformer is directly connected to the input single pole port and the other end is configured to be directly connected to the ground potential, - an LNA output port comprising a first port directly connected to one end of the secondary winding of the second transformer and a second port directly connected to the other end of the secondary winding of the second transformer, and - at least one LNA circuit switch directly connected at one end to first port of the LNA output port the other end being directly connected to the second port of the LNA output port; and wherein the first transformer and the second transformer are center tap transformers having a center tap configured to be directly connected to the ground potential. - an input single pole port, and - a PA circuit comprising: - a first transformer having a primary and secondary winding, wherein one end of the primary winding is directly connected to the input single pole port and the other end is configured to be directly connected to a ground potential, - an output port comprising a first output port directly connected to one end of the secondary winding of the first transformer and a second output port directly connected to the other end of the secondary winding of the first transformer, - at least one positive port switch directly connected at one end to a positive end of the secondary winding of the first transformer, the other end of the switch being configured to be directly connected to the ground potential, and - at least one negative port switch directly connected at one end to a negative end of the secondary winding of the first transformer, the other end of the switch being configured to be directly connected to the ground potential, - a first transformer having a primary and secondary winding, wherein one end of the primary winding is directly connected to the input single pole port and the other end is configured to be directly connected to a ground potential, - an output port comprising a first output port directly connected to one end of the secondary winding of the first transformer and a second output port directly connected to the other end of the secondary winding of the first transformer, - at least one positive port switch directly connected at one end to a positive end of the secondary winding of the first transformer, the other end of the switch being configured to be directly connected to the ground potential, and - at least one negative port switch directly connected at one end to a negative end of the secondary winding of the first transformer, the other end of the switch being configured to be directly connected to the ground potential, - a LNA circuit comprising: - a second transformer having a primary and secondary winding, wherein one end of the primary winding of the second transformer is directly connected to the input single pole port and the other end is configured to be directly connected to the ground potential, - an LNA output port comprising a first port directly connected to one end of the secondary winding of the second transformer and a second port directly connected to the other end of the secondary winding of the second transformer, and - at least one LNA circuit switch directly connected at one end to first port of the LNA output port the other end being directly connected to the second port of the LNA output port; and - a second transformer having a primary and secondary winding, wherein one end of the primary winding of the second transformer is directly connected to the input single pole port and the other end is configured to be directly connected to the ground potential, - an LNA output port comprising a first port directly connected to one end of the secondary winding of the second transformer and a second port directly connected to the other end of the secondary winding of the second transformer, and - at least one LNA circuit switch directly connected at one end to first port of the LNA output port the other end being directly connected to the second port of the LNA output port; and