Dual gate MESFET for mixer design

Dear all,

I want to design a dualgate mixer ,for fm receiver . When i check in google , all the dual gate FETS are obsalete . Will somebody tell why the dual gate fets are obsalte and which componet replaced these type of fets. Will somebody please suggest an alternate circuit configartion for this?

Akhil

If you don't mind AGC, Dual-gate MOS transistors are not essential.There are many other methods to realize a mixer.

Recently I bought from China BF998 dual-gate MOSFETs which work very well (price less than 10 cent each).
https://www.aliexpress.com

Even if you are using a dual-gate MOSFET to build a mixer I would recommend to use a balanced configuration which improves the linearity:
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