A frequency translated filter (400; 500), comprising: a passive mixer (410; 510) comprising N frequency conversion branches (430, 440; 530, 540), wherein N is an integer greater than four, each of the N frequency conversion branches (430, 440; 530, 540) being configured to mix a radio frequency, RF, signal received at a mixer input (450; 570) with a different one of non-overlapping N local oscillator, LO, signals (460; 590), such that the passive mixer comprises one output for each of the N frequency conversion branches, each of the N LO signals (460; 590) having a duty-cycle equal to 1/N, and the N LO signals (460; 590) each having a fundamental frequency equal to ω LO; and a baseband impedance (420; 520) comprising N capacitors coupled between said outputs of the passive mixer (410; 510) and ground, wherein each output is coupled via a capacitor (C BB1, C BB2, C BB3, C BB4,..., C BB(N-1), C BBN) to ground; wherein the mixer input (450; 570) is configured to present a first impedance path to ground for frequency components of the RF signal within a frequency band of interest, said frequency band of interest defining a predetermined range of frequencies (ω a, ω b) containing desired information within the received radio frequency signal, and a second impedance path to ground for frequency components of the RF signal outside the frequency band of interest; wherein the first impedance path has a higher impedance than the second impedance path; characterized in that N has a value such that a frequency component of the RF signal at (N-1)*(ω LO) is outside the frequency band of interest for any value of ω LO within the frequency band of interest. a passive mixer (410; 510) comprising N frequency conversion branches (430, 440; 530, 540), wherein N is an integer greater than four, each of the N frequency conversion branches (430, 440; 530, 540) being configured to mix a radio frequency, RF, signal received at a mixer input (450; 570) with a different one of non-overlapping N local oscillator, LO, signals (460; 590), such that the passive mixer comprises one output for each of the N frequency conversion branches, each of the N LO signals (460; 590) having a duty-cycle equal to 1/N, and the N LO signals (460; 590) each having a fundamental frequency equal to ω LO; and a baseband impedance (420; 520) comprising N capacitors coupled between said outputs of the passive mixer (410; 510) and ground, wherein each output is coupled via a capacitor (C BB1, C BB2, C BB3, C BB4,..., C BB(N-1), C BBN) to ground; wherein the mixer input (450; 570) is configured to present a first impedance path to ground for frequency components of the RF signal within a frequency band of interest, said frequency band of interest defining a predetermined range of frequencies (ω a, ω b) containing desired information within the received radio frequency signal, and a second impedance path to ground for frequency components of the RF signal outside the frequency band of interest; wherein the first impedance path has a higher impedance than the second impedance path; a first impedance path to ground for frequency components of the RF signal within a frequency band of interest, said frequency band of interest defining a predetermined range of frequencies (ω a, ω b) containing desired information within the received radio frequency signal, and a second impedance path to ground for frequency components of the RF signal outside the frequency band of interest; wherein the first impedance path has a higher impedance than the second impedance path;