Wide band mixer and 90deg phase shifter available?

HI, 

Looking for:

a) A wide band mixer that has at least the following characteristics: 

1. Input signal frequency range: DC-5.5 GHz
2. LO: 80 MHz
3. Output Frequency range: 200-5.5 GHz

  The mixer should support the input and output frequency ranges within the same HW (I assume that there might be some degradation in low frequencies

b)  90 degrees phase shift device with the following properties:

1. Very small and low power
2. Frequency range: DC-5.5 GHz (or as close to it as possible)

   This is for the image rejection mixer implementation.

Thanks

Freddy