Band switching balun

1. A band-switching network, comprising:

a dual-band circuit comprising a first output and a second output, a primary coil, a first secondary coil coupled to the first output and a second secondary coil coupled to the second output, a layout of first secondary coil is located within a layout of the primary coil, and wherein the layout of the primary coil is located within a layout of the second secondary coil; and

a switch network comprising a first switch and a second switch, an input to the first switch being coupled to the first output and an input to the second switch being coupled to the second output.

2. The band-switching network of claim 1 , wherein the dual-band circuit comprises a dual-band balun, and

wherein a layout of the dual-band balun comprises a single balun footprint.

3. The band-switching network of claim 1 , wherein a frequency band of the first output comprises a Fifth Generation (5G) 28G band, and a frequency band of the second output comprises a 5G 39G band.

4. The band-switching network of claim 3 , wherein an output of the first switch is coupled to an output of the second switch.

5. The band-switching network of claim 1 , wherein the first output is coupled to a first input of a signal-path chain, and a first output of the signal-path chain is coupled to the input to the first switch, and

wherein the second output is coupled to a second input of the signal-path chain, and a second output of the signal-path chain is coupled to the input of the second switch.

6. The band-switching network of claim 5 , wherein the first secondary coil includes a first tap for a first bias input, and the second secondary coil includes a second tap for a second bias input, the first bias input controlling a first signal path between the first secondary coil and the first input of the signal-path chain and the second bias input controlling a second signal path between the second secondary coil and the second input of the signal-path chain.

7. A band-switching network, comprising:

a dual-band circuit comprising a first output and a second output, a primary coil, a first secondary coil coupled to the first output and a second secondary coil coupled to the second output, a layout of first secondary coil is located within a layout of the primary coil, and wherein the layout of the primary coil is located within a layout of the second secondary coil; and

a signal-path chain comprising a first input and a second input, the first output being coupled to the first input of the signal-path chain, and the second output being coupled to the second input of the signal-path chain.

8. The band-switching network of claim 7 , wherein the dual-band circuit comprises a dual-band balun, and

wherein a layout of the dual-band balun comprises a single balun footprint.

9. The band-switching network of claim 8 , wherein a frequency band of the first output comprises a Fifth Generation (5G) 28G band, and a frequency band of the second output comprises a 5G 39G band.

10. The band-switching network of claim 7 , wherein the first secondary coil includes a first tap for a first bias input, and the second secondary coil includes a second tap for a second bias input, the first bias input controlling a first signal path between the first secondary coil and the first input of the signal-path chain and the second bias input controlling a second signal path between the second secondary coil and the second input of the signal-path chain.

11. The band-switching network of claim 10 , further comprising a switch network comprising a first switch and a second switch, an input to the first switch being coupled to the first output and an input to the second switch being coupled to the second output, an output of the first switch being coupled to an output of the second switch.

12. A band-switching network, comprising:

a dual-band circuit comprising a primary coil, a first secondary coil and a second secondary coil, the first secondary coil being coupled to a first output of the dual-band circuit and the second secondary coil being coupled to a second output of the dual-band circuit, a layout of first secondary coil is located within a layout of the primary coil, and wherein the layout of the primary coil is located within a layout of the second secondary coil;

a switch network comprising a first switch and a second switch, an input to the first switch being coupled to the first output and an input to the second switch being coupled to the second output, an output of the first switch being coupled to an output of the second switch; and

a signal chain comprising a first input and a second input, the first output being coupled to the first input of the signal chain, and the second output being coupled to the second input of the signal chain.

13. The band-switching network of claim 12 , wherein the dual-band circuit comprises a dual-band balun, and

wherein a layout of the dual-band balun comprises a single balun footprint.

14. The band-switching network of claim 13 , wherein a frequency band of the first output comprises a Fifth Generation (5G) 28G band, and a frequency band of the second output comprises a 5G 39G band.

15. The band-switching network of claim 14 , wherein the first secondary coil includes a first tap for a first bias input, and the second secondary coil includes a second tap for a second bias input, the first bias input controlling a first signal path between the first secondary coil and the first input of the signal chain and the second bias input controlling a second signal path between the second secondary coil and the second input of the signal chain.